python 面试常见的编程题

1、冒泡排序

def foo(list):
    n = len(list)
    for i in range(n):
        for j in range(0, n-i-1):
            if list[j] > list[j+1]:
                list[j], list[j+1] = list[j+1], list[j]
    return list

2、二分查找

def foo1(list, item):
    low = 0
    high = len(list) - 1
    while low <= high:
        mid = (high - low) // 2 + low
        guess = list[mid]  # 中位数
        if guess > item:
            high = mid -1
        elif guess < item:
            low = mid + 1
        else:
            return mid

3、水仙花数（1000内取值）

def foo2(num):
    a = num // 100 # 百位取余
    b = num % 100 // 10  # 10位取余
    c = num % 10 # 个位取余
    d = a ** 3 + b ** 3 + c ** 3
    if num == d:
        print(num)

4、斐波那契数列

def foo(num):
    if num <= 1:
        return num
    else:
        return foo(num-1) + foo(num-2)

def foo(num):
    n, a, b = 0, 0, 1
    while n < num:
        print(b)
        a, b = b, a+b
        n = n + 1