Python 2.7：如何在 Windows 上将新行的分隔符限制为“\\n”？

Question

When I write into a text file within a python 2.7 script that runs on Windows the new line delimiter is '\\r\\n' , but I would like it to be '\\n' .

I have tried to use open with newline='\\n' , but it raised an exception.

import io
f= io.open("myfile.txt", "w", newline="\n")
f.write(”aaaaaaa”)
f.close()

Answer 1

The following works for me and writes using \\n instead of \\r\\n

 import io
 f= io.open("myfile.txt", "w", newline="\n")
 #note the io module requires you to write unicode
 f.write(unicode("asdasd\nasdasasd\n"))
 f.close()

Answer 2

If you use open("file.ext", "wb") to open the file in binary mode, you will have your desired behavior. The conversion of "\\n" to "\\r\\n" is only done:

• if you're on Windows and
• open your file in text mode, ie open("file.ext", "w")