code: def _crs_parser(cls, value):
      
      parsed_value = value
      if isinstance(parsed_value, int):
          parsed_value = str(parsed_value)
      if isinstance(parsed_value, str):
          parsed_value = parsed_value.strip('epsgEPSG: ')
      return super(_BaseCRS, cls).__new__(cls, parsed_value)
docs: Parses user input for class CRS
  
      :param cls: class object
      :param value: user input for CRS
      :type value: str, int or CRS