Returns the encoding of the file.

file. encoding

None

#TODO

When Unicode strings are written to a file, they will be converted to byte strings using this encoding. In addition, when the file is connected to a terminal, the attribute gives the encoding that the terminal is likely to use (that information might be incorrect if the user has misconfigured the terminal). The attribute is read-only and may not be present on all file-like objects. It may also be None, in which case the file uses the system default encoding for converting Unicode strings.

>>> f = io.open(r'C:\aiw.txt', encoding='utf-8')
>>> f.encoding
'utf-8'

#TODO