Lazy input example

gistfile1.py

class LazyInput(object):
    def __init__(self, str):
        self._str = str
        self._as_str = None

    def __str__(self):
        if self._as_str is None:
            self._as_str = raw_input(self._str)

        return self._as_str

    def __unicode__(self):
        return unicode(self.__str__())

    def __repr__(self):
        return self.__str__()


kwargs = {'test': 'val'}

print(kwargs.get('test', LazyInput('my test')))
print(kwargs.get('print', LazyInput('my test')))