original_docstring: 
          valid post code cannot start with digit 0, 5, 7, 8 or 9
          
docstring: valid post code cannot start with digit 0, 5, 7, 8 or 9
docstring_tokens: valid post code cannot start with digit 0 5 7 8 or 9
code: def start_digit_validate(postcode):
          '''
          valid post code cannot start with digit 0, 5, 7, 8 or 9
          '''
          if postcode[0] in '05789':
              return False
          return func(postcode)
code_tokens: def start_digit_validate ( postcode ) : if postcode [ 0 ] in '05789' : return False return func ( postcode )
short_docstring: valid post code cannot start with digit 0, 5, 7, 8 or 9
short_docstring_tokens: valid post code cannot start with digit 0 5 7 8 or 9
comment: '''
          valid post code cannot start with digit 0, 5, 7, 8 or 9
          '''