code: def temporary_tables(**kwargs):
      
      global _TABLES
  
      original = _TABLES.copy()
  
      for k, v in kwargs.items():
          if not isinstance(v, pd.DataFrame):
              raise ValueError('tables only accepts DataFrames')
          add_table(k, v)
  
      yield
  
      _TABLES = original
docs: Temporarily set DataFrames as registered tables.
  
      Tables will be returned to their original state when the context
      manager exits. Caching is not enabled for tables registered via
      this function.