C:\Python27\lib\mimetypes.py中可能会报错
File "C:\Python27\lib\mimetypes.py", line 250, in enum_types ctype = ctype.encode(default_encoding) # omit in 3.x! UnicodeDecodeError: ‘ascii‘ codec can‘t decode byte 0xe0 in position 0: ordinal not in range(128)
解决方案如下：
是一个bug来的，注释掉下面几行即可
try: ctype = ctype.encode(default_encoding) # omit in 3.x! except UnicodeEncodeError: pass