我跟随有关python3算法的书。 但我的代码不起作用。 它看起来与本书完全相同。哪里错了?
def binary_search(list, item):
low = 0
high = len(list)-1
while low <= high:
mid = (low+high)//2
guess = list[mid]
if guess == item:
return mid
if guess > item:
high = mid - 1
else :
low = mid + 1
return None
my_list = [1, 3, 5, 7, 9]
print(binary_search(my_list, 3))