Sorting, searching, and counting

Sorting

argpartition(a, kth[, axis, kind, order])	Perform an indirect partition along the given axis.
argsort(a[, axis, kind, order])	Returns the indices that would sort an array.
partition(a, kth[, axis, kind, order])	Returns a partitioned copy of an array.
sort(a[, axis, kind, order])	Returns a sorted copy of an array.
sort_complex(a)	Returns a sorted copy of an array sorted along the last axis.

Searching

argmax(a[, axis, out, keepdims])	Returns the indices of the maximum values along an axis.
argmin(a[, axis, out, keepdims])	Returns the indices of the minimum values along an axis.
argwhere(a)	Find the indices of array elements that are non-zero, grouped by element.
flatnonzero(a)	Return indices that are non-zero in the flattened version of a.
nanargmax(a[, axis, out, keepdims])	Return the indices of the maximum values in the specified axis ignoring NaNs.
nanargmin(a[, axis, out, keepdims])	Return the indices of the minimum values in the specified axis ignoring NaNs.
nonzero(a)	Return the indices of the elements that are non-zero.
searchsorted(a, v[, side, sorter])	Find the indices into a sorted array a such that, if the corresponding elements in v were inserted before the indices, the order of a would be preserved.
extract(condition, arr)	Return the elements of an array that satisfy some condition.
where(condition, [x, y])	Return elements chosen from x or y depending on condition.

Counting

count_nonzero(a[, axis])

Counts the number of non-zero values in the array a.