Question

字符串将所有字母转换为大写字母
整数和浮点数的值增加1
布尔值被否定（False变为True，True变为False）
列表被替换为“List”

我遇到的问题是，如果要复制一份，我们就会改变列表本身以下是我到目前为止所做的事情：

def mutate_me(my_list):
'''(list)-> NoneType
returns my_list mutated the same way
as the function copy_me

>>>test_list = [1, 2.5, "1abc", [1, 2, 3], False]
>>>mutate_me(test_list)
>>>test_list = [2, 3.5, "1ABC", "List", True]

>>>test_list = [2, False, ["list"], "Hello", 1.0]
>>>mutate_me(test_list)
>>>test_list = [3, True, "List", "HELLO", 2.0]
'''
# go through every element in the list
# check there type and based upon there
# type apply the rule
for element in my_list:
    if(type(element) == str):
        for i in element:
            if(i.isalpha()):
                element = element.upper()
        my_list.append(element)
    elif(type(element) == int or type(element) == float):
        element = element + 1
    elif(type(element) == bool):
        element = not element
    elif(type(element) == list):
        element = "List"
    else:
        element

Answer 1

def mutate_me(my_list):
    for idx, element in enumerate(my_list):
        if(type(element) == str):
            my_list[idx] = element.upper()
        elif(type(element) == int or type(element) == float):
            my_list[idx] = element + 1
        elif(type(element) == bool):
            my_list[idx] = not element
        elif(type(element) == list):
            my_list[idx] = "List"

Answer 2

以下是解决方案的一小部分示例

for i, element in enumerate(my_list):
    if(type(element) == str):
        my_list[i] = element.upper()

迭代时需要枚举变异

我需要一个以列表作为输入的函数，但返回none并以下列方式更改输入：

2 个答案: