Python的lambda函數

>>> add = lambda a, b: a + b<br />>>> add(3,4)<br />7<br />>>> add2 = lambda a, b: add(a, b) + 3<br />>>> add2(3, 4)<br />10<br />>>> add3 = lambda a, b=3: a + b<br />>>> add3(5)<br />8<br />>>> add3(b=5, a=6)<br />11<br />>>> (lambda a, *b: print b)(1, 2, 3, 4)<br />SyntaxError: invalid syntax<br />>>> (lambda a, *b: b)(1, 2, 3, 4)<br />(2, 3, 4)<br />>>> (lambda a, **b: b)(1, c=1, d=2, e=3)<br />{'c': 1, 'e': 3, 'd': 2}<br />>>> (lambda a, **b: b)(1, c=1, b=2, e=3)<br />{'c': 1, 'b': 2, 'e': 3}<br />>>>