C++中有重载，python的可以用这种方法实现可变参数。先来看个例子：def foo(*args, **kwargs):
print 'args = ', args
print 'kwargs = ', kwargs
print '---------------------------------------'if __name__ == '__main__':
foo(1,2,3,4)
foo(a=1,b=2,c=3)
foo(1,2,3,4, a=1,b=2,c=3)
foo('a', 1, None, a=1, b='2', c=3)输出结果如下：args =(1, 2,...
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