Max和Min字符

Question

我对蟒蛇很陌生。我试图做一个发电机，需要从一个输入3个字母。我需要它只接受3封信，不要少。我放的if len不起作用

import random

usernames = int(input("How Many Usernames Are To Be Generated?"))
names = []
for item in range(0,usernames):
    names.append(input("What Is The First Three Letters of The Pupils Name?"))
if len(names) == 3:
    suffixes = ["ing", "end", "axe", "gex", "goh"]
    for name in names:
        final = name + random.choice(suffixes)
        print(final)
else (names):
    print("Error! Must Be 3 Characters")

Answer 1

否则不需要任何条件

import random

usernames = int(input("How Many Usernames Are To Be Generated?"))
names = []
for item in range(0,usernames):
    names.append(input("What Is The First Three Letters of The Pupils Name?"))
if len(names) == 3:
    suffixes = ["ing", "end", "axe", "gex", "goh"]
    for name in names:
        final = name + random.choice(suffixes)
        print(final)
else :
    print("Error! Must Be 3 Characters")

Answer 2

为什么名字是一张名单？

您有一个空列表，name = []。

然后给它添加一个项目。

names.append(input("What ..

这就是它失败的原因，因为名字的编号是1。

要么去掉列表，要么检查第一项的内容。

if len(names[0]) == 3