#利用内置type()函数
> nfc=["Packers","49"]
> afc=["Ravens","48"]
> combine=zip(nfc,afc)
> type(combine)
<class 'zip'>

#利用内置函数id(),是以十进制显示
> id(nfc)
2646554913160
> id(afc)
2646554913544

> import sys
> print(sys.getsizeof(combine))
64
> print(sys.getsizeof(nfc))
80
> print(sys.getsizeof(afc))
80 

id(object) -> integer
Return the identity of an object. This is guaranteed to be unique among
simultaneously existing objects. (Hint: it's the object's memory address.)