pandas.errors.UndefinedVariableError — pandas 2.2.3 documentation (original) (raw)

exception pandas.errors.UndefinedVariableError(name, is_local=None)[source]#

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