一、文件操作模式概述
1、打开文件的模式：
- r， 只读模式【默认】
- w，只写模式【不可读；不存在则创建；存在则删除内容；】
- a， 追加模式【不可读；不存在则创建；存在则只追加内容；】
2、"+" 同时读写某个文件：
- r+，可读写文件。【可读；可写；可追加】
- w+，写读
- a+，追加读
3、"U"表示在读取时，可以将 \r \n \r\n自动转换成 \n （与 r 或 r+ 模式同使用）
- rU
- r+U
4、"b"表示处理二进制文件（如：FTP发送上传ISO镜像文件，linux可忽略，windows处理二进制文件时需标注）
- rb
- wb
- ab
5、所有功能
class TextIOWrapper(_TextIOBase): """ Character and line based layer over a BufferedIOBase object, buffer. encoding gives the name of the encoding that the stream will be decoded or encoded with. It defaults to locale.getpreferredencoding(False). errors determines the strictness of encoding and decoding (see help(codecs.Codec) or the documentation for codecs.register) and defaults to "strict". newline controls how line endings are handled. It can be None, '', '\n', '\r', and '\r\n'. It works as follows: * On input, if newline is None, universal newlines mode is enabled. Lines in the input can end in '\n', '\r', or '\r\n', and these are translated into '\n' before being returned to the caller. If it is '', universal newline mode is enabled, but line endings are returned to the caller untranslated. If it has any of the other legal values, input lines are only terminated by the given string, and the line ending is returned to the caller untranslated. * On output, if newline is None, any '\n' characters written are translated to the system default line separator, os.linesep. If newline is '' or '\n', no translation takes place. If newline is any of the other legal values, any '\n' characters written are translated to the given string. If line_buffering is True, a call to flush is implied when a call to write contains a newline character. """ def close(self, *args, **kwargs): # real signature unknown pass def detach(self, *args, **kwargs): # real signature unknown pass def fileno(self, *args, **kwargs): # real signature unknown pass def flush(self, *args, **kwargs): # real signature unknown pass def isatty(self, *args, **kwargs): # real signature unknown pass def read(self, *args, **kwargs): # real signature unknown pass def readable(self, *args, **kwargs): # real signature unknown pass def readline(self, *args, **kwargs): # real signature unknown pass def seek(self, *args, **kwargs): # real signature unknown pass def seekable(self, *args, **kwargs): # real signature unknown pass def tell(self, *args, **kwargs): # real signature unknown pass def truncate(self, *args, **kwargs): # real signature unknown pass def writable(self, *args, **kwargs): # real signature unknown pass def write(self, *args, **kwargs): # real signature unknown pass def __getstate__(self, *args, **kwargs): # real signature unknown pass def __init__(self, *args, **kwargs): # real signature unknown pass @staticmethod # known case of __new__ def __new__(*args, **kwargs): # real signature unknown """ Create and return a new object. See help(type) for accurate signature. """ pass def __next__(self, *args, **kwargs): # real signature unknown """ Implement next(self). """ pass def __repr__(self, *args, **kwargs): # real signature unknown """ Return repr(self). """ pass buffer = property(lambda self: object(), lambda self, v: None, lambda self: None) # default closed = property(lambda self: object(), lambda self, v: None, lambda self: None) # default encoding = property(lambda self: object(), lambda self, v: None, lambda self: None) # default errors = property(lambda self: object(), lambda self, v: None, lambda self: None) # default line_buffering = property(lambda self: object(), lambda self, v: None, lambda self: None) # default name = property(lambda self: object(), lambda self, v: None, lambda self: None) # default newlines = property(lambda self: object(), lambda self, v: None, lambda self: None) # default _CHUNK_SIZE = property(lambda self: object(), lambda self, v: None, lambda self: None) # default _finalizing = property(lambda self: object(), lambda self, v: None, lambda self: None) # default