pandas.errors.UndefinedVariableError

exception pandas.errors.UndefinedVariableError(name, is_local=None)

Exception raised by query or eval 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