my_search.py

import random

alist = []
for i in range(1, 101):
    alist.append(i)
n = random.choice(alist)
# 请完善二分查找函数binary_search(),查找出num在列表alist里面的索引位置
def bs(alist,n):
    l=0
    h=len(alist)-1
    whilt l <=h:
        m=(l+h)//2
        g=alist
        if g ==n:
            return m 
        elif g < b:
            l = m+1
        else: g > b:
            h = m-1
    return None 

r = bs(alist,n)
print("找到了,索引值为",m)
print("找到了,索引值为",m)