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

exception pandas.errors.PerformanceWarning[source]#

Warning raised when there is a possible performance impact.

Examples

df = pd.DataFrame({"jim": [0, 0, 1, 1], ... "joe": ["x", "x", "z", "y"], ... "jolie": [1, 2, 3, 4]}) df = df.set_index(["jim", "joe"]) df jolie jim joe 0 x 1 x 2 1 z 3 y 4 df.loc[(1, 'z')]

PerformanceWarning: indexing past lexsort depth may impact performance.

df.loc[(1, 'z')] jolie jim joe 1 z 3