for i in range(a):
    for j in range(b):
        dict[i,j] = int_error("Введите цифру массива: ")
for i in range(a):
    print(*[dict[i,j] for j in range(b)])

a = [
	[0, 9],
	[1, 8],
	[2, 7],
	[3, 6],
	[4, 5],
]
b = []
c = []
for i in range(len(a)):
	b.append(a[i][0])
	c.append(a[i][1])
print (min(b), min(c))
>>> 0 5

>>> a = [	[0, 9],	[1, 8],	[2, 7],	[3, 6],	[4, 5]]
>>> print map(min, zip(*a))
[0, 5]

>>> [min(v) for v in zip(*a)]
[0, 5]

>>> import numpy as np
>>> np.min(a,0)
array([0, 5])

a = [[0, 9],
     [1, 8],
     [2, 7],
     [3, 6],
     [4, 5]]
def mymin(lol, column):
    return min(lol, key=lambda r:r[column])[column]
print(mymin(a, 0), mymin(a, 1))

a = int_error("Введите количество строк: ")
b = int_error("Введите количество колонок: ")
dict = {}
for i in range(a):
    for j in range(b):
        dict[i,j] = int_error("Введите цифру массива: ")
for i in range(a):
    print(*[dict[i,j] for j in range(b)])
print(*[dict[max(i),max(j)] for j in range(b)])

[i][j]

[i, j]

dct = []
for _ in range(a):
    dct.append([0] * b)