partial operator

partial_operator.py

def partial_operator(oper, b):
    """ Returns a partially applied operator with the first parameter
    unspecified. Example::

        >>> less_than_ten = partial_operator(operator.lt, 10)

    The operator is annotated with an attribute 'b' which contains the
    partially applied operand. """
    @wraps(oper)
    def wrapped(a):
        return oper(a, b)
    wrapped.b = b
    return wrapped