parameters: (self)
return_statement: return str(self.columns_)
docstring: Convert to string
  
          Returns:
              String representation of schema
docstring_summary: Convert to string
docstring_tokens: Convert to string
function: def __str__(self):
          """ Convert to string
  
          Returns:
              String representation of schema
          """
          return str(self.columns_)
function_tokens: def __str__ ( self ) : return str ( self . columns_ )