Answers for "'charmap' codec can't decode byte 0x81 in position 6235: character maps to <undefined>"

UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 6148: character maps to <undefined>

Add encoding:
	
	file = open(filename, encoding="utf8")

UnicodeDecodeError: 'charmap' codec can't decode byte 0x9e in position 3359: character maps to <undefined>

#add the encoding parameter for open method
with open(filename, encoding='utf8') as infile:

'charmap' codec can't decode byte 0x98 in position 11354: character maps to <undefined>

file = open(filename, encoding="utf8")