How do I limit the available inputs?

Question

Example:

x = input("+, -, /, *")

If the user does not use one of these choices, print a "Try again" and loop until an acceptable input is submitted. Thank you.

Answer 1

Heath Williams , please show us your attempt. please put your code in playground and link it here. thanks.

but i can give you some hints concerning your question

( i assume that input is just one character)
▪︎put all allowed characters in a list
▪︎use a while loop to get input
▪︎ check if the input character is in the list of allowed cgaracters
if YES: use break to leave the loop
▪︎if NO, you can show the message, and the loop will be executed again

Answer 2

by defining your own user input function, but with another name to be able to call the builtin:

def lim_input(char):
char = char.split(',')
while True:
res = input()
if res in char:
return res
print('try again...')

x = lim_input("+,-,/,*")
print(x)