斐波那契数列的python实现

#!/usr/bin/env python
#-*- coding:utf-8 -*-
'''
斐波那契数列:初始为0,1,列表中的一个数字是前两个元素的和
'''
num=int(raw_input('请输入要计算的斐波那契数列的数目:'))
def fibs(num):
    '文档字符串  fibs.__doc__查看'
    result=[0,1]
    for i in range(num-2):
        result.append(result[-2]+result[-1])
    return result
print fibs(num)

请输入要计算的斐波那契数列的数目:50
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817, 39088169, 63245986, 102334155, 165580141, 267914296, 433494437, 701408733, 1134903170, 1836311903, 2971215073, 4807526976, 7778742049]