Conditional Prompt

[lpinilla]

Hi!

I would like to know if it's possible to create a Prompt that needs a conditional function to return true to continue. This could be useful for example if I need the user to input a file or a host and I need to check whether their input is correct (file exists or host is up).

It could be used the following way:

import os
from rich.prompt import Prompt

def file_exists_condition(user_in):
    return os.path.exists(user_in)

filename = Prompt.ask('Enter filename', file_exists_condition)

Inside prompt's code, it simply needs to run the custom function with the user input as a parameter and if it fails, re-ask for another input.

Is there a current way to do this or does it need to be a feature request?

[willmcgugan]

Not as such, but this doesn't need to be a part of the core library as you could implement it while a loop.

while True:
    filename = Prompt.ask("Enter a filename")
    if not os.path.exists(filename):
        print("file must exist")
    else:
        break

[lpinilla]

Yep, this works, thanks!