getting 64 bit integer in python

Question

So I am thinking of writing a bitboard in python or lisp. But I don't know how to ensure I would get a 64 bit integer in python. I have been reading documentation and found that mpz library returns a unsigned 32 bit integer. Is this true? If not what should I do?

Answer 1

Python 2 has two integer types: int, which is a signed integer whose size equals your machine's word size (but is always at least 32 bits), and long, which is unlimited in size.

Python 3 has only one integer type, which is called int but is equivalent to a Python 2 long.