def hints_for(choices):
    """
    Build a hint string from choices options represented as a tuple of tuples.
    For example:

    .. sourcecode:: python

        >>> hints_for((
        ...         ('1', 'One'),
        ...         ('2', 'Two'),))
        '1=One, 2=Two'

    :rtype: str
    """
    return ', '.join(['{}={}'.format(value, label) for value, label in choices])