Sorting

NumPy has several data sorting routines:

• The sort() function returns a sorted array
• The lexsort() function performs sorting with a list of keys
• The argsort() function returns the indices that will sort an array
• The ndarray class has a sort() method that performs in-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, the argsort() and sort() functions are available as methods on NumPy arrays as well.