Answers for "return codecs.charmap_decode(input,self.errors,decoding_table)[0] UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 2633: c"

UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 92: character maps to <undefined>

#that's worked for me 

file = open(filepath,"r", encoding="utf8")

UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 92: character maps to <undefined>

file = open(filename, encoding="cp437")