From Club Ubuntu

This code is meant as a way to help with user input from the CLI

Code

""" A questionaire for things like installers, wizards, etc """

import re

class question:
    def __init__(self, question, match="", invalid_statement="'{{input}}' is not valid"):
        """ question asks a question ("question") and will only continue if
            the input received matches the regex "match". If match is empty
            then it is assumed anything matches. invalid_statement is printed when
            the user inputs something not matching matches. An optional {{input}}
            var can be used in the invalid_statement argument.
        """

        self.question = question
        self.match_value = match
        self.match = re.compile(match.lower())
        self.invalid_statement = invalid_statement
        
        question_complete = False

        while not question_complete:
            self._input = raw_input(self.question)

            # First makes sure that question wants a specific value and if so, 
            # checks for this value. Otherwise, the question is complete.
            if self.match_value and not self.match.match(self._input.lower()):
                print self.invalid_statement.replace("{{input}}", self._input)
            else:
                question_complete = True
  
    def ask(self):
        self.__init__(self.question, self.match_value, self.invalid_statement)

    def get_result(self):
        return self._input

    def get_match(self):
        return self.match.match(self._input.lower())