pandas.errors.UndefinedVariableError#
- exception pandas.errors.UndefinedVariableError(name, is_local=None)[source]#
Exception raised by
query
oreval
when using an undefined variable name.It will also specify whether the undefined variable is local or not.
Examples
>>> df = pd.DataFrame({'A': [1, 1, 1]}) >>> df.query("A > x") ... # UndefinedVariableError: name 'x' is not defined >>> df.query("A > @y") ... # UndefinedVariableError: local variable 'y' is not defined >>> pd.eval('x + 1') ... # UndefinedVariableError: name 'x' is not defined