code: def as_python(self, infile, include_original_shex: bool=False):
          
          self._context.resolve_circular_references()            # add forwards for any circular entries
          body = ''
          for k in self._context.ordered_elements():
              v = self._context.grammarelts[k]
              if isinstance(v, (JSGLexerRuleBlock, JSGObjectExpr)):
                  body += v.as_python(k)
                  if isinstance(v, JSGObjectExpr) and not self._context.has_typeid:
                      self._context.directives.append(f'_CONTEXT.TYPE_EXCEPTIONS.append("{k}")')
              elif isinstance(v, JSGForwardRef):
                  pass
              elif isinstance(v, (JSGValueType, JSGArrayExpr)):
                  body += f"\n\n\n{k} = {v.signature_type()}"
              else:
                  raise NotImplementedError("Unknown grammar elt for {}".format(k))
              self._context.forward_refs.pop(k, None)
  
          body = '\n' + '\n'.join(self._context.directives) + body
          return _jsg_python_template.format(infile=infile,
                                             original_shex='# ' + self.text if include_original_shex else "",
                                             version=__version__,
                                             gendate=datetime.datetime.now().strftime("%Y-%m-%d %H:%M"),
                                             body=body)
docs: Return the python representation of the document