python code for index of maximum in list code example

Example 1: python how to return max num index

import numpy as np

x=[1,2,3,4,5]

max_index=np.argmax(x) 
# return the index of the maximun element
# max_index has the value 4

Example 2: find location of max value in python list

>>> m = max(a)
>>> [i for i, j in enumerate(a) if j == m]
[9, 12]