如何在python列表中执行if和else语句

Question

user = input("userinput: ")

myList = ["Noah", "Mike"]
for item in list:
    if user == item:
        print("hello {}".format(user))
    else:
        print("invalid")

what I am trying to do is if you said something in the list you get hello (and the name you pick)

for ex:

input: Noah

output: hello Noah

And if you do not put any thing in nothing in the list correctly

input: Mikee

output: invalid

so basically I am asking a more complex if and else statement in python lists

Answer 1

You're iterating over each item in the list and printing its validity. You want to check just once:

user = input("userinput: ")

myList = ["Noah", "Mike"]
if user in myList:
    print("hello {}".format(user))
else:
    print("invalid")

Answer 2

user = input("userinput: ")

myList = ["Noah", "Mike"]

if user in myList:
    print("hello {}".format(user))
else:
    print("invalid")

you need to just check that value is exist in list or not.

Answer 3

Seems like a great use case for ternary operator:

user = input("userinput: ")
myList = ["Noah", "Mike"]

print("hello {}".format(user)) if (user in myList) else print("invalid")