当函数的参数不确定时，可以使用*args 和**kwargs，*args 没有key值，**kwargs有key值。
还是直接来代码吧，废话少说
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def fun_var_args(farg, *args):
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print "arg:", farg
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for value in args:
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print "another arg:", value
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fun_var_args(1, "two", 3)
result:
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arg: 1
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another arg: two
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another arg: 3
**kwargs:
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def fun_var_kwargs(farg, **kwargs):
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print "arg:", farg
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for key in kwargs:
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print "another keyword arg: %s: %s" % (key, kwargs[key])
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fun_var_kwargs(farg=1, myarg2="two", myarg3=3)
result:
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arg: 1
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another keyword arg: myarg2: two
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another keyword arg: myarg3: 3
也可以用下面的形式：
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def fun_var_args_call(arg1, arg2, arg3):
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print "arg1:", arg1
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print "arg2:", arg2
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print "arg3:", arg3
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args = ["two", 3]
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fun_var_args_call(1, *args)
result：
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arg1: 1
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arg2: two
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arg3: 3
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def fun_var_args_call(arg1, arg2, arg3):
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print "arg1:", arg1
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print "arg2:", arg2
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print "arg3:", arg3
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kwargs = {"arg3": 3, "arg2": "two"}
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fun_var_args_call(1, **kwargs)
result：
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arg1: 1
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arg2:"two"
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arg3:3
