Sorting

NumPy has several data sorting routines, as follows:

• The sort function returns a sorted array

• The lexsort function performs sorting with a list of keys

• The argsort function returns the indices that would sort an array

• The ndarray class has a sort method that performs place sorting

• The msort function sorts an array along the first axis

• The sort_complex function sorts complex numbers by their real part and then their imaginary part

From this list argsort and sort are available as methods on NumPy arrays as well.