Python remove line from file

In this tutorial, we will see 3 examples of reading a text file in Python 3. One easy way to read a text file and parse each line is to use the python statement “readlines” on a file object. How To Read all lines in a file at once? Use readlines() If you want to read all lines of a file at the same time, Python’s readlines() function is ... Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2)

Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ... If you need to remove line breaks from text with Python you can use next string method: replace(old, new [, count]) Return a copy of the string with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced. Line breaks in text are generally represented as:

May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line) Remove lines that contain certain string. ... I'm trying to read a text from a text file, read lines, delete lines that contain specific string (in this case 'bad ... I did the same using "sed command" invoked on the shell from python script but my code reviewer didn't want to spawn a new process for such a simple thing..... Both have pros and cons, like in file.read() file needs to be read in memory and can be an issue for large files but I need to get my code checked in first : ) – ViFI Jul 9 '16 at 0:55

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Delete first line from file. Python Forums on Bytes. ... How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks May 28, 2017 · Python: Replacing lines in a file. ... per line the goal is to process the file and replace known mac addresses with their equivalent device name using Python. ... Others can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete. Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python Others can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete.

Mar 01, 2005 · (3 replies) Hi How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? regards. ... [Python] Delete first line from ... In this article we will discuss different ways to read a file line by line in Python. Suppose we have a file data.txt in same directory as our python script. Let’s see how to read it’s contents line by line. Sep 24, 2016 · Text file processing :- How to delete a line in text file using Python. Let us start by creating a simple text file ‘myfile‘, Content of the file is as follows. A Python program can read a text file using the built-in open() function. For example, below is a Python 3 program that opens lorem.txt for reading in text mode, reads the contents into a string variable named contents, closes the file, and then prints the data. I've been writing a python script to help me clear up some files that contain outdated code, while also serving as a way to learn python. These files have sections of code surrounded with tags on their own lines, I need it to remove both the tags and everything within.

There are couple of ways: 1. Open the file in text editor and delete the lines 2. Open the file using Python and read the file line by lines. Keep a counter of which line you are reading and keep writing the lines to another file until the count...

Jan 24, 2018 · Python tutorial to remove duplicate lines from a text file : In this tutorial, we will learn how to remove the duplicate lines from a text file using python. The program will first read the lines of an input text file and write the lines to one output text file. To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files. Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python I liked the fileinput approach as explained in this answer: Deleting a line from a text file (python) Say for example I have a file which has empty lines in it and I want to remove empty lines, here's how I solved it: Sep 24, 2016 · Text file processing :- How to delete a line in text file using Python. Let us start by creating a simple text file ‘myfile‘, Content of the file is as follows. You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46 Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2)

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  • In this tutorial, you will learn about how to remove the last line from a text file in Python. Handling files in python play a crucial role in web applications. Here we use some predefined file handling operations like creating, writing, reading, deleting files. We use these file handling operations to remove the last line from a text file in ... ;
  • File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL ;
  • Have another way to solve this solution? Contribute your code (and comments) through Disqus. Previous: Write a Python program to assess if a file is closed or not. Next: Write a Python program that takes a text file as input and returns the number of words of a given text file. ;
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  • Delete first line from file. Python Forums on Bytes. ... How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? ;
  • Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. ;
  • May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... ;
  • In this tutorial, we will see 3 examples of reading a text file in Python 3. One easy way to read a text file and parse each line is to use the python statement “readlines” on a file object. How To Read all lines in a file at once? Use readlines() If you want to read all lines of a file at the same time, Python’s readlines() function is ... ;
  • Delete first line from file. Python Forums on Bytes. ... How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? ;
  • Mar 01, 2005 · (3 replies) Hi How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? regards. ... [Python] Delete first line from ... ;
  • May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... ;
  • In this tutorial we are going to learn about Python File Operations such as python read file, python write file, open file, delete file and copy file. Our previous tutorial was on Python Dictionary . ;
  • Text files can be used in many situations. For example, you may save your data with Python in a text file or you may fetch the data of a text file in Python. In my previous, I have shown you How to create a text file in Python. Now I will show you how to count the number of lines in a text file. In order to open a file, we need to use the open ... ;
  • Task. Remove a specific line or a number of lines from a file. This should be implemented as a routine that takes three parameters (filename, starting line, and the number of lines to be removed). ;
  • Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ... ;
  • Delete specific lines from the CSV file in python I am trying to remove rows with a specific ID within particular dates from a large CSV file. The CSV file contains a column [3] with dates formatted like "1962-05-23" and a column with identifiers [2]: "ddd:011232700:mpeg21:a00191" ... ;
  • To replace string in File using Python, 1.Open input file in read mode. 2.Open output file in write mode. 3. For each line read from input file, replace the string and write to output file. ;
  • Hey all Yet another Python related question (sorry about this). Basically I would like to know if it is possible to search through a text file and remove empty lines without damaging the rest of the content. ;
  • Feb 18, 2010 · Subject: [Tutor] How to delete the last line from a file efficiently? Hi all, Now I have a text file about 1MB. Sometimes I need to remove the last line. The current method I use is reading all content, finding the last sentence, remove it and write the new content to the file. So, it need to read a 1MB file and write a 1MB file. ;
  • examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line) .

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  • There are couple of ways: 1. Open the file in text editor and delete the lines 2. Open the file using Python and read the file line by lines. Keep a counter of which line you are reading and keep writing the lines to another file until the count... ;
  • In this tutorial we are going to learn about Python File Operations such as python read file, python write file, open file, delete file and copy file. Our previous tutorial was on Python Dictionary . ;
  • You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46 .

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I've been writing a python script to help me clear up some files that contain outdated code, while also serving as a way to learn python. These files have sections of code surrounded with tags on their own lines, I need it to remove both the tags and everything within. C Program to Delete a Specific Line From a Text File - In this program, user is asked for a filename he needs to change. User is also asked for the line number that is to be deleted. The filename is stored in I liked the fileinput approach as explained in this answer: Deleting a line from a text file (python) Say for example I have a file which has empty lines in it and I want to remove empty lines, here's how I solved it:

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  • Oticon 8 beepsBaked beans calories carbsTo replace string in File using Python, 1.Open input file in read mode. 2.Open output file in write mode. 3. For each line read from input file, replace the string and write to output file. In this tutorial we are going to learn about Python File Operations such as python read file, python write file, open file, delete file and copy file. Our previous tutorial was on Python Dictionary . Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks In this article we will discuss different ways to read a file line by line in Python. Suppose we have a file data.txt in same directory as our python script. Let’s see how to read it’s contents line by line.
  • Wedding vows for older couplesA Python program can read a text file using the built-in open() function. For example, below is a Python 3 program that opens lorem.txt for reading in text mode, reads the contents into a string variable named contents, closes the file, and then prints the data. examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line) ;
  • Math qualifying examI've been writing a python script to help me clear up some files that contain outdated code, while also serving as a way to learn python. These files have sections of code surrounded with tags on their own lines, I need it to remove both the tags and everything within. Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks In this tutorial, we will see 3 examples of reading a text file in Python 3. One easy way to read a text file and parse each line is to use the python statement “readlines” on a file object. How To Read all lines in a file at once? Use readlines() If you want to read all lines of a file at the same time, Python’s readlines() function is ... In this article we will discuss different ways to read a file line by line in Python. Suppose we have a file data.txt in same directory as our python script. Let’s see how to read it’s contents line by line. To replace string in File using Python, 1.Open input file in read mode. 2.Open output file in write mode. 3. For each line read from input file, replace the string and write to output file. Mar 01, 2005 · (3 replies) Hi How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? regards. ... [Python] Delete first line from ... May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ...

Reset rhino 6 to default settingsOthers can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete. Others can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete.

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What language is this appIt will give the impression that we have deleted the specific lines from the file. This file can be a simple text file or a CSV file. With this approach, we can remove lines from huge files too, in a memory-efficient way. Let’s use this logic and implement our functions around it, Delete a line from a file by specific line number in python Aug 25, 2016 · Learn how to Remove Duplicates from Text File using Python. Swg best place to grind rifleman

  • The manual gearboxApr 20, 2015 · This is the third article of the "Super sed' Series", in which we will learn how to delete lines from a file using line numbers and regular expressions.In the first two articles, we have learned, how to print lines using sed and how to append and insert lines in a file using sed. Task. Remove a specific line or a number of lines from a file. This should be implemented as a routine that takes three parameters (filename, starting line, and the number of lines to be removed). Sep 24, 2016 · Text file processing :- How to delete a line in text file using Python. Let us start by creating a simple text file ‘myfile‘, Content of the file is as follows.
  • Ironridge xr100 roof mount racking kitTo read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files.
  • Myristica sebifera 200 usesI did the same using "sed command" invoked on the shell from python script but my code reviewer didn't want to spawn a new process for such a simple thing..... Both have pros and cons, like in file.read() file needs to be read in memory and can be an issue for large files but I need to get my code checked in first : ) – ViFI Jul 9 '16 at 0:55 Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
  • Lucia taruvi manhwaApr 20, 2015 · This is the third article of the "Super sed' Series", in which we will learn how to delete lines from a file using line numbers and regular expressions.In the first two articles, we have learned, how to print lines using sed and how to append and insert lines in a file using sed. Dec 18, 2014 · Pattern matching. Since reading by lines each is required we can take a stream coming in(from file read) and replace the line with some special chars in start. Create ...

While you can use Python to delete information from files, you may find you no longer need the file at all. The following steps describe how to delete files that you no longer need. Open a Python File window. You see an editor in which you can type the example code. Type the following code … In this article we will discuss different ways to read a file line by line in Python. Suppose we have a file data.txt in same directory as our python script. Let’s see how to read it’s contents line by line.

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  • Text files can be used in many situations. For example, you may save your data with Python in a text file or you may fetch the data of a text file in Python. In my previous, I have shown you How to create a text file in Python. Now I will show you how to count the number of lines in a text file. In order to open a file, we need to use the open ... ;
  • May 28, 2017 · Python: Replacing lines in a file. ... per line the goal is to process the file and replace known mac addresses with their equivalent device name using Python. ...

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I have jest started learning Python. I would like to get some help on writing a script that would delete a set number of lines from a text file which looks like this : Here is an example how to do this. I had to create your kind of data file first to use it properly ... data_str = """\ 1846440556 ... Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ... Have another way to solve this solution? Contribute your code (and comments) through Disqus. Previous: Write a Python program to assess if a file is closed or not. Next: Write a Python program that takes a text file as input and returns the number of words of a given text file. While you can use Python to delete information from files, you may find you no longer need the file at all. The following steps describe how to delete files that you no longer need. Open a Python File window. You see an editor in which you can type the example code. Type the following code … Feb 28, 2019 · The cleanest approach, if possible, is to use [code ]\r[/code], which goes back to the beginning of the line. Your next print will simply start from where the previous one started.

I liked the fileinput approach as explained in this answer: Deleting a line from a text file (python) Say for example I have a file which has empty lines in it and I want to remove empty lines, here's how I solved it:

  • To replace string in File using Python, 1.Open input file in read mode. 2.Open output file in write mode. 3. For each line read from input file, replace the string and write to output file.
  • In this tutorial, you will learn about how to remove the last line from a text file in Python. Handling files in python play a crucial role in web applications. Here we use some predefined file handling operations like creating, writing, reading, deleting files. We use these file handling operations to remove the last line from a text file in ...
  • Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ...
  • May 28, 2017 · Python: Replacing lines in a file. ... per line the goal is to process the file and replace known mac addresses with their equivalent device name using Python. ...
  • examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line)

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  • Apr 20, 2015 · This is the third article of the "Super sed' Series", in which we will learn how to delete lines from a file using line numbers and regular expressions.In the first two articles, we have learned, how to print lines using sed and how to append and insert lines in a file using sed.

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File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL Python: How to delete specific lines in a file in a memory-efficient way? C++ : Check if given path is a file or directory using Boost & C++17 FileSystem Library; Python: Open a file using “open with” statement & benefits explained with examples; C++: How to extract file extension from a path string using Boost & C++17 FileSystem Library 4x4 post spacing for lean to

Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files.

File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... Hey all Yet another Python related question (sorry about this). Basically I would like to know if it is possible to search through a text file and remove empty lines without damaging the rest of the content. To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files.

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May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ...

The lines you read include the end-of-line (eol) from the input file. The print command adds its own end-of-line. So you end up with two eol hence one blank line. You can fix this using strip() on the line you read. For example line.strip() will discard eol from line. Remove lines that contain certain string. ... I'm trying to read a text from a text file, read lines, delete lines that contain specific string (in this case 'bad ... How to change minecraft server iconHave another way to solve this solution? Contribute your code (and comments) through Disqus. Previous: Write a Python program to assess if a file is closed or not. Next: Write a Python program that takes a text file as input and returns the number of words of a given text file. In this tutorial, we will see 3 examples of reading a text file in Python 3. One easy way to read a text file and parse each line is to use the python statement “readlines” on a file object. How To Read all lines in a file at once? Use readlines() If you want to read all lines of a file at the same time, Python’s readlines() function is ... In this article we will discuss different ways to read a file line by line in Python. Suppose we have a file data.txt in same directory as our python script. Let’s see how to read it’s contents line by line. You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46

Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2)

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Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python Feb 18, 2010 · Subject: [Tutor] How to delete the last line from a file efficiently? Hi all, Now I have a text file about 1MB. Sometimes I need to remove the last line. The current method I use is reading all content, finding the last sentence, remove it and write the new content to the file. So, it need to read a 1MB file and write a 1MB file. File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL In this tutorial we are going to learn about Python File Operations such as python read file, python write file, open file, delete file and copy file. Our previous tutorial was on Python Dictionary . Feb 28, 2019 · The cleanest approach, if possible, is to use [code ]\r[/code], which goes back to the beginning of the line. Your next print will simply start from where the previous one started.

Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ... Feb 18, 2010 · Subject: [Tutor] How to delete the last line from a file efficiently? Hi all, Now I have a text file about 1MB. Sometimes I need to remove the last line. The current method I use is reading all content, finding the last sentence, remove it and write the new content to the file. So, it need to read a 1MB file and write a 1MB file.

File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL If you need to remove line breaks from text with Python you can use next string method: replace(old, new [, count]) Return a copy of the string with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced. Line breaks in text are generally represented as: To replace string in File using Python, 1.Open input file in read mode. 2.Open output file in write mode. 3. For each line read from input file, replace the string and write to output file.

Aug 17, 2018 · Removing blank lines from a file requires two steps. First, we need to loop through the file lines. Second, check if the line is empty. In Python, there are different ways to perform the loop and check. Let us summarize that… Loop method. There are multiple styles to iterate through file lines. Here are some examples…

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In this tutorial, we will see 3 examples of reading a text file in Python 3. One easy way to read a text file and parse each line is to use the python statement “readlines” on a file object. How To Read all lines in a file at once? Use readlines() If you want to read all lines of a file at the same time, Python’s readlines() function is ...

Jan 24, 2018 · Python tutorial to remove duplicate lines from a text file : In this tutorial, we will learn how to remove the duplicate lines from a text file using python. The program will first read the lines of an input text file and write the lines to one output text file. Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks Delete specific lines from the CSV file in python I am trying to remove rows with a specific ID within particular dates from a large CSV file. The CSV file contains a column [3] with dates formatted like "1962-05-23" and a column with identifiers [2]: "ddd:011232700:mpeg21:a00191" ... , Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2) Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Mar 01, 2005 · (3 replies) Hi How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? regards. ... [Python] Delete first line from ... Apr 20, 2015 · This is the third article of the "Super sed' Series", in which we will learn how to delete lines from a file using line numbers and regular expressions.In the first two articles, we have learned, how to print lines using sed and how to append and insert lines in a file using sed. Apr 20, 2015 · This is the third article of the "Super sed' Series", in which we will learn how to delete lines from a file using line numbers and regular expressions.In the first two articles, we have learned, how to print lines using sed and how to append and insert lines in a file using sed.

Dec 18, 2014 · Pattern matching. Since reading by lines each is required we can take a stream coming in(from file read) and replace the line with some special chars in start. Create ... You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46

examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line)

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  • The lines you read include the end-of-line (eol) from the input file. The print command adds its own end-of-line. So you end up with two eol hence one blank line. You can fix this using strip() on the line you read. For example line.strip() will discard eol from line.

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A Python program can read a text file using the built-in open() function. For example, below is a Python 3 program that opens lorem.txt for reading in text mode, reads the contents into a string variable named contents, closes the file, and then prints the data. Text files can be used in many situations. For example, you may save your data with Python in a text file or you may fetch the data of a text file in Python. In my previous, I have shown you How to create a text file in Python. Now I will show you how to count the number of lines in a text file. In order to open a file, we need to use the open ... May 28, 2017 · Python: Replacing lines in a file. ... per line the goal is to process the file and replace known mac addresses with their equivalent device name using Python. ... и File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL Jan 24, 2018 · Python tutorial to remove duplicate lines from a text file : In this tutorial, we will learn how to remove the duplicate lines from a text file using python. The program will first read the lines of an input text file and write the lines to one output text file.

Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python

To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files. Hey all Yet another Python related question (sorry about this). Basically I would like to know if it is possible to search through a text file and remove empty lines without damaging the rest of the content.

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  • Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2)

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May 28, 2017 · Python: Replacing lines in a file. ... per line the goal is to process the file and replace known mac addresses with their equivalent device name using Python. ... It will give the impression that we have deleted the specific lines from the file. This file can be a simple text file or a CSV file. With this approach, we can remove lines from huge files too, in a memory-efficient way. Let’s use this logic and implement our functions around it, Delete a line from a file by specific line number in python

  • Others can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete. ;
  • Muriatic acid gold testCan't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ... ;
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  • «Jan 24, 2018 · Python tutorial to remove duplicate lines from a text file : In this tutorial, we will learn how to remove the duplicate lines from a text file using python. The program will first read the lines of an input text file and write the lines to one output text file.

Polaris 570 seat removalMay 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46 There are couple of ways: 1. Open the file in text editor and delete the lines 2. Open the file using Python and read the file line by lines. Keep a counter of which line you are reading and keep writing the lines to another file until the count... In this tutorial, we will see 3 examples of reading a text file in Python 3. One easy way to read a text file and parse each line is to use the python statement “readlines” on a file object. How To Read all lines in a file at once? Use readlines() If you want to read all lines of a file at the same time, Python’s readlines() function is ...

Arkansas tiny house lawsMar 01, 2005 · (3 replies) Hi How can I read the first line of a file and then delete this line, so that line 2 is line 1 on next read? regards. ... [Python] Delete first line from ... examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line)

Matthijs verhage labIn this tutorial, you will learn about how to remove the last line from a text file in Python. Handling files in python play a crucial role in web applications. Here we use some predefined file handling operations like creating, writing, reading, deleting files. We use these file handling operations to remove the last line from a text file in ... To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files. Task. Remove a specific line or a number of lines from a file. This should be implemented as a routine that takes three parameters (filename, starting line, and the number of lines to be removed). May 28, 2017 · Python: Replacing lines in a file. ... per line the goal is to process the file and replace known mac addresses with their equivalent device name using Python. ... While you can use Python to delete information from files, you may find you no longer need the file at all. The following steps describe how to delete files that you no longer need. Open a Python File window. You see an editor in which you can type the example code. Type the following code … To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files.

Bougiedop vervangen scooterSep 24, 2016 · Text file processing :- How to delete a line in text file using Python. Let us start by creating a simple text file ‘myfile‘, Content of the file is as follows. I liked the fileinput approach as explained in this answer: Deleting a line from a text file (python) Say for example I have a file which has empty lines in it and I want to remove empty lines, here's how I solved it:

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File Handling Python File Handling Python Read Files Python Write/Create Files Python Delete Files Machine Learning Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Python MySQL Apr 20, 2015 · This is the third article of the "Super sed' Series", in which we will learn how to delete lines from a file using line numbers and regular expressions.In the first two articles, we have learned, how to print lines using sed and how to append and insert lines in a file using sed. C Program to Delete a Specific Line From a Text File - In this program, user is asked for a filename he needs to change. User is also asked for the line number that is to be deleted. The filename is stored in In this tutorial we are going to learn about Python File Operations such as python read file, python write file, open file, delete file and copy file. Our previous tutorial was on Python Dictionary . Aug 17, 2018 · Removing blank lines from a file requires two steps. First, we need to loop through the file lines. Second, check if the line is empty. In Python, there are different ways to perform the loop and check. Let us summarize that… Loop method. There are multiple styles to iterate through file lines. Here are some examples… To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files.

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I liked the fileinput approach as explained in this answer: Deleting a line from a text file (python) Say for example I have a file which has empty lines in it and I want to remove empty lines, here's how I solved it: It will give the impression that we have deleted the specific lines from the file. This file can be a simple text file or a CSV file. With this approach, we can remove lines from huge files too, in a memory-efficient way. Let’s use this logic and implement our functions around it, Delete a line from a file by specific line number in python Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2)

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If you need to remove line breaks from text with Python you can use next string method: replace(old, new [, count]) Return a copy of the string with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced. Line breaks in text are generally represented as: May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ...

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Others can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete. Aug 25, 2016 · Learn how to Remove Duplicates from Text File using Python.

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Sep 28, 2017 · While it is up to the programmer to determine a suitable chunk size, perhaps the most commonly used is simply a line of a file at a time. This is what we will be discussing in this article - memory management by reading in a file line-by-line in Python. The code used in this article can be found in the following GitHub repo. Basic File IO in Python It will give the impression that we have deleted the specific lines from the file. This file can be a simple text file or a CSV file. With this approach, we can remove lines from huge files too, in a memory-efficient way. Let’s use this logic and implement our functions around it, Delete a line from a file by specific line number in python

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examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line)

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Remove lines that contain certain string. ... I'm trying to read a text from a text file, read lines, delete lines that contain specific string (in this case 'bad ...

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In this tutorial we are going to learn about Python File Operations such as python read file, python write file, open file, delete file and copy file. Our previous tutorial was on Python Dictionary . May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ...

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Hey all Yet another Python related question (sorry about this). Basically I would like to know if it is possible to search through a text file and remove empty lines without damaging the rest of the content. Delete specific lines from the CSV file in python I am trying to remove rows with a specific ID within particular dates from a large CSV file. The CSV file contains a column [3] with dates formatted like "1962-05-23" and a column with identifiers [2]: "ddd:011232700:mpeg21:a00191" ...

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Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ...

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Have another way to solve this solution? Contribute your code (and comments) through Disqus. Previous: Write a Python program to assess if a file is closed or not. Next: Write a Python program that takes a text file as input and returns the number of words of a given text file. I've been writing a python script to help me clear up some files that contain outdated code, while also serving as a way to learn python. These files have sections of code surrounded with tags on their own lines, I need it to remove both the tags and everything within.

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A Python program can read a text file using the built-in open() function. For example, below is a Python 3 program that opens lorem.txt for reading in text mode, reads the contents into a string variable named contents, closes the file, and then prints the data.

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In this tutorial, you will learn about how to remove the last line from a text file in Python. Handling files in python play a crucial role in web applications. Here we use some predefined file handling operations like creating, writing, reading, deleting files. We use these file handling operations to remove the last line from a text file in ...

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I did the same using "sed command" invoked on the shell from python script but my code reviewer didn't want to spawn a new process for such a simple thing..... Both have pros and cons, like in file.read() file needs to be read in memory and can be an issue for large files but I need to get my code checked in first : ) – ViFI Jul 9 '16 at 0:55

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Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ... Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ...

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Have another way to solve this solution? Contribute your code (and comments) through Disqus. Previous: Write a Python program to assess if a file is closed or not. Next: Write a Python program that takes a text file as input and returns the number of words of a given text file. Aug 25, 2016 · Learn how to Remove Duplicates from Text File using Python.

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May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks

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Strip Newline in Python | 4 Example Codes (Remove Trailing & Leading Blank Line) In this Python tutorial, I’ll explain how to remove blank newlines from a string. More precisely, I’m going to show you in four examples how to… strip trailing and leading newlines (Example 1) strip trailing newlines only (Example 2)

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May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ...

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examples/files/read_file_remove_newlines.py filename = 'examples/files/numbers.txt' with open(filename, 'r') as fh: for line in fh: line = line.rstrip(" ") print(line)

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While you can use Python to delete information from files, you may find you no longer need the file at all. The following steps describe how to delete files that you no longer need. Open a Python File window. You see an editor in which you can type the example code. Type the following code …

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Can't seem to figure out how to delete several lines from a text file: Cosmosso: 9: 402: Dec-10-2019, 11:09 PM Last Post: Cosmosso : python one line file processing: har: 4: 362: Dec-09-2019, 06:10 AM Last Post: har : line number of first and second occurance of string in a file: mdalireza: 1: 162: Nov-18-2019, 09:55 AM Last Post: perfringo ...

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C Program to Delete a Specific Line From a Text File - In this program, user is asked for a filename he needs to change. User is also asked for the line number that is to be deleted. The filename is stored in Delete specific lines from the CSV file in python I am trying to remove rows with a specific ID within particular dates from a large CSV file. The CSV file contains a column [3] with dates formatted like "1962-05-23" and a column with identifiers [2]: "ddd:011232700:mpeg21:a00191" ...

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May 03, 2019 · Delete a folder with all of its files; But before we begin, here is the general syntax that you may apply in Python to delete a file or folder: Delete a file import os os.remove(r'Path where the file is stored\File Name.File type') Delete an empty folder import os os.rmdir(r'Path where the empty folder is stored\Folder name') Delete a folder ... You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46

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To read a specific line from a text file in Python you can use readlines() or you can also import linecache. Here we gonna learn reading a specific line from a text file in Python for both large and small files. Feb 18, 2010 · Subject: [Tutor] How to delete the last line from a file efficiently? Hi all, Now I have a text file about 1MB. Sometimes I need to remove the last line. The current method I use is reading all content, finding the last sentence, remove it and write the new content to the file. So, it need to read a 1MB file and write a 1MB file.

Dec 17, 2007 · (8 replies) Hi, I need to write a program which reads an external text file. Each time it reads, then it needs to delete some lines, for instance from second line to 55th line. The file is really big, so what do you think is the fastest method to delete specific lines in a text file ? Thanks
I did the same using "sed command" invoked on the shell from python script but my code reviewer didn't want to spawn a new process for such a simple thing..... Both have pros and cons, like in file.read() file needs to be read in memory and can be an issue for large files but I need to get my code checked in first : ) – ViFI Jul 9 '16 at 0:55
You understand that this leaves you with an xml file that is syntactically incorrect, i.e. you're missing the closing </Networks> tag by removing the line. – wurtel Mar 16 '15 at 10:45 yes I know that ( the first Networks exist on the top of the file – maihabunash Mar 16 '15 at 10:46 Others can most likely explain this better than me, but as far as I know it is not possible to delete lines from a file. Reading from and writing to file objects behaves like a stream, so in order to change the file you have to read it, and write a new file omitting the lines you want to delete. I have jest started learning Python. I would like to get some help on writing a script that would delete a set number of lines from a text file which looks like this : Here is an example how to do this. I had to create your kind of data file first to use it properly ... data_str = """\ 1846440556 ...