code: def remove_chars(str_, char_list):
      
      outstr = str_[:]
      for char in char_list:
          outstr = outstr.replace(char, '')
      return outstr
docs: removes all chars in char_list from str_
  
      Args:
          str_ (str):
          char_list (list):
  
      Returns:
          str: outstr
  
      Example:
          >>> # ENABLE_DOCTEST
          >>> from utool.util_str import *  # NOQA
          >>> str_ = '1, 2, 3, 4'
          >>> char_list = [',']
          >>> result = remove_chars(str_, char_list)
          >>> print(result)
          1 2 3 4