How can I force Python s file write to use the same newline format in Windows as in Linux r n vs n

Question

I have the simple code   f   open  out txt   w   f write  line1 n   f write  line2   f close     Code runs on windows and gives file size 12 bytes  and linux gives 11 bytes The reason is new line  In linux it s  n and for win it is  r n  But in my code I specify new line as  n  The question is how can I make python keep new line as  n always  and not check the operating system

User · Answer

You can still use the textmode and force the linefeed-newline with the keyword argument newline   f   open    foo   w  newline   n     Tested with Python 3 4 2   Edit  This does not work in Python 2 7

User · Answer

You need to open the file in binary mode i e  wb instead of w  If you don t  the end of line characters are auto-converted to OS specific ones    Here is an excerpt from Python reference about open         The default is to use text mode  which may convert   n  characters to a platform-specific representation on writing and back on reading

[python] How can I force Python's file.write() to use the same newline format in Windows as in Linux ("\r\n" vs. "\n")?

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