How can I force Python’s file.write() to use the same newline format in Windows as in Linux (“\r\n” vs. “\n”)?

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.

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