Convert to Boolean

boolify.py

def boolify(value):
    """
    Convert to bool.

    >>> falsy = None, False, 0, b'', '', '0', 'false', 'off'
    >>> truthy = True, 1, b'\\0', '1', 'true', 'on', 'A'
    >>> any(boolify(x) for x in falsy)
    False
    >>> all(boolify(x) for x in truthy)
    True
    """
    if isinstance(value, str):
        value = value.lower()

        if value in ('0', 'false', 'off'):
            return False

    return bool(value)