and return it.

    Raises :class:`TypeError` if unable to convert to a bool

    :arg value: String, int, or float to convert to bool. Valid booleans include:
         '1', 'on', 1, '0', 0, 'n', 'f', 'false', 'true', 'y', 't', 'yes', 'no', 'off'

    :returns: Boolean True or False
    z %s cannot be converted to a bool)r