code: def parse_logical_form(self,
                             logical_form: str,
                             remove_var_function: bool = True) -> Expression:
          
          if not logical_form.startswith("("):
              logical_form = f"({logical_form})"
          if remove_var_function:
              # Replace "(x)" with "x"
              logical_form = re.sub(r'\(([x-z])\)', r'\1', logical_form)
              # Replace "(var x)" with "(x)"
              logical_form = re.sub(r'\(var ([x-z])\)', r'(\1)', logical_form)
          parsed_lisp = semparse_util.lisp_to_nested_expression(logical_form)
          translated_string = self._process_nested_expression(parsed_lisp)
          type_signature = self.local_type_signatures.copy()
          type_signature.update(self.global_type_signatures)
          return self._logic_parser.parse(translated_string, signature=type_signature)
docs: Takes a logical form as a string, maps its tokens using the mapping and returns a parsed expression.
  
          Parameters
          ----------
          logical_form : ``str``
              Logical form to parse
          remove_var_function : ``bool`` (optional)
              ``var`` is a special function that some languages use within lambda functions to
              indicate the usage of a variable. If your language uses it, and you do not want to
              include it in the parsed expression, set this flag. You may want to do this if you are
              generating an action sequence from this parsed expression, because it is easier to let
              the decoder not produce this function due to the way constrained decoding is currently
              implemented.