Codeforces Beta Round #89 (Div. 2), problem: (B) Present from Lena, 118B, Python

118B.py

inp = int(raw_input())
k = inp - 1

def generate(n):
    return [' ' for i in range(inp - n + 1)] \
        + [str(i) for i in range(n)] + [str(i) for i in range(n-1)][::-1]

for i in range(inp + 1):
    print " ".join(generate(i + 1))

while(k >= 0):
    print " ".join(generate(k + 1))
    k -= 1