abc = {}
abc[int: anotherint]

Then the error came up. TypeError: unhashable type? Why I received this? I've tried str()

This seems to be a syntax issue:

>>> abc = {}
>>> abc[1] = 2
>>> abc
{1: 2}
>>> abc = {1:2, 3:4}
>>> abc
{1: 2, 3: 4}
>>> 

At least the syntax of following is incorrect

abc[int: anotherint]

I guess you want to say

abc = [int: anotherint]

Which is incorrect too. The correct way is

abc = {int: anotherint}

unless abc is already defined in which case:

abc[int] = anotherint

is also a valid option.