code: def _variable_parts(self, line, codeline):
          
          var_subs = []
          # codeline has pattern and then has the outputs in different versions
          if codeline:
              var_subs = self._find_variable(codeline.pattern, line)
          else:
              # make variable part of the line string without all the other stuff
              line_str = self._strip_datetime(self._strip_counters(line))
              var_subs = [line_str.strip()]
          return var_subs
docs: Return variable parts of the codeline, given the static parts.