file open utf-8 error 발생 시 errors='ignore'

(result, consumed) = self._buffer_decode(data, self.errors, final)

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

 

open(path) 

==> open(path, encoding="utf-8", errors='ignore')

 

or 

contents = contents.decode('utf-8', 'ignore')