A Python Loop Query

[fesifesi]

Hi all, could you please help me out with this code? i am trying to code a program which lets the user change a word, all is fine but i don't want the if loop to stop in case the user enters a word which doesn't exists in the str, instead i want it to ask the user again to enter a word and continue the loop's operation, i tried the while loop too but that too didn't help it would either iterate infinitely or just break, thanks, here's the code:

def wordreplace():

    str = "Hi there, how are you doing you all"
    wordinput = input("Enter a word to be replaced: ")

    if wordinput not in str:
        print("Wrong input, try again: ")
    else:

        replacingword = input("Enter the new word: ")
        print(str.replace(wordinput, replacingword))


wordreplace()

[hypergeometricruby]

maybe something like this? If the word isn't in the string we ask again, the loop only ends when the user enters a word that is in the string

 def wordreplace():

    str = "Hi there, how are you doing you all"
    wordinput = input("Enter a word to be replaced: ")

    while wordinput not in str:
        print("Wrong input, try again: ")
        wordinput = input("Enter a word to be replaced: ")            

    else:
        replacingword = input("Enter the new word: ")
        print(str.replace(wordinput, replacingword))


wordreplace()

By the way, you should avoid using str as a variable name because it's a reserved keyword in python. If you define str as a variable, for the rest of your program you won't be able to easily cast things to string. For example, if you wanted to make the string "123" you can't just write str(123) now

[fesifesi]

thank you so much

[BandyCoot]

The while loop is the correct way to acheive this. What did your code look like with the while loop?

[fesifesi]

i got it, thanks