Python File I/O – Correct Way to Write Line to File

file-iopython

How do I write a line to a file in modern Python? I heard that this is deprecated:

print >>f, "hi there"

Also, does "\n" work on all platforms, or should I use "\r\n" on Windows?

Best Answer

This should be as simple as:

with open('somefile.txt', 'a') as the_file:
    the_file.write('Hello\n')

From The Documentation:

Do not use os.linesep as a line terminator when writing files opened in text mode (the default); use a single '\n' instead, on all platforms.

Some useful reading:

The with statement
open()
- 'a' is for append, or use
- 'w' to write with truncation
os (particularly os.linesep)

Related Solutions

Python File I/O – How to Write to File

You can manually open and close a file but it is better to use with since it handles closing the file for you.

with open("score_file.txt",'a') as f:
    f.write(score)

'a' means append to file which does not overwrite the previous contents - this is what you are probably looking for. From what I can tell you are going to want to add this after the print statement or right before. If you don't understand reading and writing to files, then you should check out this link.

Best Answer

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Python File I/O – How to Write to File

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