python读写文件 问题

newline controls how universal newlines mode works (it only applies to text mode). It can be None, '', ' ', ' ', and ' '. It works as follows:

[...]

• When writing output to the stream, if newline is None, any ' ' characters written are translated to the system default line separator, os.linesep. If newline is '' or ' ', no translation takes place. If newline is any of the other legal values, any ' ' characters written are translated to the given string.

open(..., 'w', newline='')


当newline='
',read,write数据中的
都不会转化。