Series.rank()

axis: {0 or ?index?, 1 or ?columns?}, default 0

index to direct ranking

method : {?average?, ?min?, ?max?, ?first?, ?dense?}

• average: average rank of group
• min: lowest rank in group
• max: highest rank in group
• first: ranks assigned in order they appear in the array
• dense: like ?min?, but rank always increases by 1 between groups

numeric_only : boolean, default None

Include only float, int, boolean data. Valid only for DataFrame or Panel objects

na_option : {?keep?, ?top?, ?bottom?}

• keep: leave NA values where they are
• top: smallest rank if ascending
• bottom: smallest rank if descending

ascending : boolean, default True

False for ranks by high (1) to low (N)

pct : boolean, default False

Computes percentage rank of data