Python文件操作

Posted 2020-08-03 3尺尘沙

open(...)
　　open(file, mode=\'r\', buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None) -> file object
　　Open file and return a stream. Raise IOError upon failure.

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Character Meaning
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\'r\' open for reading (default)
\'w\' open for writing, truncating the file first
\'x\' create a new file and open it for writing
\'a\' open for writing, appending to the end of the file if it exists
\'b\' binary mode
\'t\' text mode (default)
\'+\' open a disk file for updating (reading and writing)
\'U\' universal newline mode (deprecated)
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The default mode is \'rt\' (open for reading text). For binary random access, the mode \'w+b\' opens and truncates the file to 0 bytes, while \'r+b\' opens the file without truncation.

The \'x\' mode implies \'w\' and raises an `FileExistsError` if the file already exists.

文件的打开模式：

 

文件的对象方法：