method description axis axis to reduce over for dataframe' rows and for columns skipna exclude missing valuestrue by default level reduce grouped by level if the axis is hierarchically-indexed (multiindexsome methodslike idxmin and idxmaxreturn indirect statistics like the index value where the minimum or maximum values are attainedin [ ]df idxmax(out[ ]one two other methods are accumulationsin [ ]df cumsum(out[ ]one two nan - nan nan - another type of method is neither reduction nor an accumulation describe is one such exampleproducing multiple summary statistics in one shotin [ ]df describe(out[ ]one two count mean - std min - - - - max - on non-numeric datadescribe produces alternate summary statisticsin [ ]obj series([' '' '' '' ' in [ ]obj describe(out[ ]count unique top freq see table - for full list of summary statistics and related methods getting started with pandas www it-ebooks info