Answers for "UnicodeEncodeError: 'charmap' codec can't encode character '\u2705' in position 0: character maps to <undefined>"

charmap' codec can't encode character 'u010d' in position 97: character maps to <undefined>

import io
with io.open(fname, "w", encoding="utf-8") as f:
    f.write(html)

UnicodeEncodeError: 'charmap' codec can't encode characters in position 6-9: character maps to <undefined>

# it works in python 3
with open(filepath, 'w', encoding='utf-8') as f:
  # do stuff ...
  f.close()