问当元组有单元组时，不能解压元组。为什么？使用元组数组。

EN

mytup=(([1,2,3],['a','b','c'],99),([2,2,3],['b','b','c'],100))
for t in mytup:
    z1,z2,z3=t
    print(z3)

99
100

mytup=(([1,2,3],['a','b','c'],99))
for t in mytup:
    z1,z2,z3=t
    print(z3)

3
c
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-171-1c4755f1cb92> in <module>
     13 mytup=(([1,2,3],['a','b','c'],99)) #,([2,2,3],['b','b','c'],100))
     14 for t in mytup:
---> 15     z1,z2,z3=t
     16     print(z3)

TypeError: cannot unpack non-iterable int object

mytup=[([1,2,3],['a','b','c'],99)]
for t in mytup:
    z1,z2,z3=t
    print(z3)

99