[已解决]请教为什么跟着视频输入还是出现错误？

WheatBlock

fibonacci_cache = {}
def fibonacci(n):
  #If we have cached the value, then return it
  if n in fibonacci_cache:
    return fibonacci_cache[n]
   #Compute the Nth term
  if n == 1:
    value = 1
  elif n== 2:
    value = 1
  elif n > 2:
    value = fibonacci(n-1) + fibonacci(n-2)
#Cache the value and return it
    fibonacci_cache[n] = value
    return value
for n in range(1,101):
  print(n,":", fibonacci(n))


提示 ：   value = fibonacci(n-1) + fibonacci(n-2)
TypeError: unsupported operand type(s) for +: 'NoneType' and 'NoneType'

最佳答案

月排行榜 / 总排行榜

人造人

2022-6-24 12:40:10

注意缩进

#!/usr/bin/env python
#coding=utf-8

fibonacci_cache = {}

def fibonacci(n):
    #If we have cached the value, then return it
    if n in fibonacci_cache:
        return fibonacci_cache[n]
    #Compute the Nth term
    if n == 1:
        value = 1
    elif n== 2:
        value = 1
    elif n > 2:
        value = fibonacci(n-1) + fibonacci(n-2)
#Cache the value and return it
    fibonacci_cache[n] = value
    return value
for n in range(1,101):
    print(n,":", fibonacci(n))

跳转到最佳答案楼层

人造人

注意缩进

#!/usr/bin/env python
#coding=utf-8

fibonacci_cache = {}

def fibonacci(n):
    #If we have cached the value, then return it
    if n in fibonacci_cache:
        return fibonacci_cache[n]
    #Compute the Nth term
    if n == 1:
        value = 1
    elif n== 2:
        value = 1
    elif n > 2:
        value = fibonacci(n-1) + fibonacci(n-2)
#Cache the value and return it
    fibonacci_cache[n] = value
    return value
for n in range(1,101):
    print(n,":", fibonacci(n))

WheatBlock

可以了，谢谢！