Дана матрица размером m х n. В каждом столбце матрицы найти максимальный элемент

import random
n=int(input('n?: '))
m=int(input('m?:'))
a=[]
for i in range (n) :
    b=[]
    for j in range (m) :
        x=random. randint(10,99)
        b.append(x)
    a. append (b)
print('Matrix:',a)
for row in a:
     print( ' '.join([str(elem) for elem in row]))
min_el=a[0] [0]
min_i=0
min_j=0
for i in range (n) :
    for j in range (m) :
        if a[i][j] <min_el:
            min_el=a[i][j]
            min_i=i
            min_j=j
print('Min element: ',min_el)

from random import randint
n = int(input('n?'))
m = int(input('m?'))
a = [[randint(10, 99) for _ in range(m)] for _ in range(n)]
print('Matrix:')
print(*a, sep='\n')
[print(min(r), end=' ') for r in zip(*a)]

print(*(min(i) for i in zip(*a)))

maximums = [float('-inf')] * m
for line in a:
    for i in range(len(line)):
        if line[i] > maximums[i]:
            maximums[i] = line[i]
print(maximums)

for j in range(m):
    tmp_maximum = float('-inf')
    for i in range(n):
        if tmp_maximum < a[i][j]:
            tmp_maximum = a[i][j]
    print(tmp_maximum, end=' ')