How do I ask the user if they want to play again and repeat the while loop?

Question

Running on Python, this is an example of my code:

import random 

comp = random.choice([1,2,3])

while True:
     user = input("Please enter 1, 2, or 3: ")
     if user == comp
             print("Tie game!")
     elif (user == "1") and (comp == "2")
             print("You lose!")
             break
     else:
             print("Your choice is not valid.")

So this part works. However, how do I exit out of this loop because after entering a correct input it keeps asking "Please input 1,2,3".

I also want to ask if the player wants to play again:

Psuedocode:

     play_again = input("If you'd like to play again, please type 'yes'")
     if play_again == "yes"
         start loop again
     else:
         exit program

Is this related to a nested loop somehow?

Solution

Points for your code:

1. Code you have pasted don't have ':' after if,elif and else.
2. Whatever you want can be achived using Control Flow Statements like continue and break. Please check here for more detail.
3. You need to remove break from "YOU LOSE" since you want to ask user whether he wants to play.
4. Code you have written will never hit "Tie Game" since you are comparing string with integer. User input which is saved in variable will be string and comp which is output of random will be integer. You have convert user input to integer as int(user).
5. Checking user input is valid or not can be simply check using in operator.

Code:

import random

while True:
     comp = random.choice([1,2,3])
     user = raw_input("Please enter 1, 2, or 3: ")
     if int(user) in [1,2,3]:
         if int(user) == comp:
            print("Tie game!")
         else:
            print("You lose!")
     else:
            print("Your choice is not valid.")

     play_again = raw_input("If you'd like to play again, please type 'yes'")
     if play_again == "yes":
        continue
     else:
         break

Comments

[Dinesh Pundkar]

@Lizzie - Please check the updated code and comments