parameters: (self)
return_statement: return len(self._stack)
docstring: Return number of items on the stack, and used for truth-value testing.
docstring_summary: Return number of items on the stack, and used for truth-value testing.
docstring_tokens: Return number of items on the stack and used for truth - value testing .
function: def __len__(self):
      """Return number of items on the stack, and used for truth-value testing."""
      return len(self._stack)
function_tokens: def __len__ ( self ) : return len ( self . _stack )