Answers for "charmap' codec can't encode characters in position"

charmap codec can't encode character

with open(filename_csv , 'w', newline='',encoding="utf-8") as csv_file:

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()