例外情况：

C:\Users\Wandres\venv\insertionsort\Scripts\python.exe C:/Users/Wandres/PycharmProjects/insertionsort/fibobottomup.py
Traceback (most recent call last):
  File "C:\Users\Wandres\PycharmProjects\insertionsort\fibobottomup.py", line 13, in <module>
    print(fibbottonup(5))
  File "C:\Users\Wandres\PycharmProjects\insertionsort\fibobottomup.py", line 8, in fibbottonup
    f=fib[k-1]+fib[k-2]
KeyError: 0

还有密码

def fibbottonup (n):  
    fib = {}     
    for  k in range (1, n + 1):    
        if k<2:       
           f=1            
           fib[k]=f        
        else:             
           f=fib[k-1] + fib[k-2]            
           fib[k]=f     
    return fib[n]

我正在学习动态规划，所以我试图使用的理论，我想添加数组中的斐波那契序列的每一个元素“fib”。我不知道错在哪里。