Sorting, searching, and counting

Sorting

ndarray.sort
sort
lexsort
argsort
msort
sort_complex
partition
argpartition

Searching

argmax(a[, axis, out]) Returns the indices of the maximum values along an axis.
argmin(a[, axis, out]) Returns the indices of the minimum values along an axis.
nanargmax
nanargmin
argwhere
nonzero
flatnonzero
where
searchsorted
extract

Counting

count_nonzero