spiral.py

from itertools import count

N = 5
i = count(1)
numbers = {}
row = start_row = 1
colon = start_col = 1

for size in range(N, 0, -1):
    for colon in range(start_col, size + 1):
        numbers[(row, colon)] = next(i)
    for row in range(start_row + 1, size + 1):
        numbers[(row, colon)] = next(i)
    for colon in range(size - 1, start_col - 1, -1):
        numbers[(row, colon)] = next(i)
    for row in range(size - 1, start_row, -1):
        numbers[(row, colon)] = next(i)
    row = start_row = start_row + 1
    colon = start_col = start_col + 1

for row in range(1, N + 1):
    for colon in range(1, N + 1):
        print(f"{numbers[(row, colon)]:4}", end=" ")
    print("\n")