python txt UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 284: character maps to <undefined> code example

Example 1: UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 6148: character maps to

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

Example 2: 'charmap' codec can't decode byte 0x98 in position

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

Example 3: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte

with open(file, newline='', encoding="utf16") as MyFile: