def first(iterable, default=None, key=None):
    """
    Return the first truthy value of an iterable.
    Shamelessly stolen from https://github.com/hynek/first
    """
    if key is None:
        for el in iterable:
            if el:
                return el
    else:
        for el in iterable:
            if key(el):
                return el
    return default