def not_in_run(func):
    """This is a decorator that signaling that a function is not available during a single run.

    """
    doc = func.__doc__
    na_string = '''\nATTENTION: This function is not available during a single run!\n'''

    if doc is not None:
        func.__doc__ = '\n'.join([doc, na_string])
    func._not_in_run = True

    @functools.wraps(func)
    def new_func(self, *args, **kwargs):

        if self._is_run:
            raise TypeError('Function `%s` is not available during a single run.' %
                            func.__name__)

        return func(self, *args, **kwargs)

    return new_func
This is a decorator that signaling that a function is not available during a single run.