how to set the max range of index of a list in python code example

Example 1: index to min python

import numpy as np
index_min = np.argmin(values)

Example 2: 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