pandas.errors.PerformanceWarning#

exceptionpandas.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          joliejim  joe0    x    1     x    21    z    3     y    4>>>df.loc[(1,'z')]# PerformanceWarning: indexing past lexsort depth may impact performance.df.loc[(1, 'z')]          joliejim  joe1    z        3