code: def check_physical(self, line):
          
          self.physical_line = line
          for name, check, argument_names in self._physical_checks:
              self.init_checker_state(name, argument_names)
              result = self.run_check(check, argument_names)
              if result is not None:
                  (offset, text) = result
                  self.report_error(self.line_number, offset, text, check)
                  if text[:4] == 'E101':
                      self.indent_char = line[0]
docs: Run all physical checks on a raw input line.