python中super()出现的TypeError: must be type, not classobj
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python中super()只能应用于新式类,而不能应用于经典类.否则会出现报错:TypeError: must be type, not classobj
Python 2.x中默认都是经典类,只有显式继承了object才是新式类
Python 3.x中默认都是新式类,不必显式的继承object
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