How to fix this Python issue?

Question

I decided to start learning python from scratch using udemy, and my instructor gave an example which was too simple, so I wanted to make It more complex. However I did experience an error and I understand why I'm getting the error but don't know how to bypass it.

Here is the code in question:

mylist = [(1,2,3),(5,6,7),(8,9)]

for a,b,c in mylist:
    print(b)

the output will be 2 6 and then an error

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-10-a5ddba3739a9> in <module>
      1 mylist = [(1,2,3),(5,6,7),(8,9)]
      2 
----> 3 for a,b,c in mylist:
      4     print(b)

ValueError: not enough values to unpack (expected 3, got 2)

Because the tuple is not the same as the first two the error occurs.

How can i fix such an issue if something similar happens in the future, because in theory It could happen and not only i can add different sized tuples in a list but other types as well.

Thanks

Edit:

Extended Unpacking was the solution, thank you everyone for the help.

Answer 1

In this particular case you can use extended unpacking

mylist = [(1,2,3),(5,6,7),(8,9)]

for a,b,*c in mylist:
    print(b)

where c will be list that holds all elements starting from index 2 to the end.

You can also check Unpacking, extended unpacking and nested extended unpacking

Answer 2

You can put None in the list

>>li=[(1,2,3),(5,6,7),(8,9,None)]
>>> for a,b,c in li:
...     print(b)