[Python] 二分查找

def binary_search(list, item):
    low = 0
    hight = len(list)-1
    while low <= hight:
        mid = int((low + hight) / 2)
        guess = list[mid]
        if guess == item:
            return mid
        if guess < item:
            low = mid + 1
        else:
            hight = mid - 1
    return None

if __name__ == "__main__":
    test_list = [1,3,7,9,32,89,100]
    print(binary_search(test_list, 100))