Updating value at each iteration using python

I want to get updated value of Pw at each iteration. For first iteration, it takes minimum value of first row and subtracts from Pw1. For second iteration, I want it to take this updated Pw (not Pw1) and subtract the minimum of second row.

import numpy as np
Pe=np.array([[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]])
Pw1=100
Pe_min=Pe.min(axis=1)

for i in range(4):
    Pw=np.zeros(4)
    Pw[i]=Pw1-Pe_min[i]
    print(Pw)

The current output is

99
95
91
87

The output I am seeking is

99
94
85
72

>Solution :

Basically,
You should update the Pw1 value in the each iteration. So you can add

Pw1-=Pe_min[i]

Full Code;

import numpy as np
Pe=np.array([[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]])
Pw1=100
Pe_min=Pe.min(axis=1)
for i in range(4):
    Pw=np.zeros(4)
    Pw[i]=Pw1-Pe_min[i]
    Pw1-=Pe_min[i]
    print(Pw)