getting 64 bit integer in python

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Chapters
00:00 Getting 64 Bit Integer In Python
00:26 Answer 1 Score 40
00:46 Accepted Answer Score 2
01:20 Thank you

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Full question
https://stackoverflow.com/questions/8676...

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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

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Tags
#python #integer #bit

#avk47

ANSWER 1

Score 40

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.

ACCEPTED ANSWER

Score 2

You have a couple of options using gmpy. Here is one example using gmpy:

>>> from gmpy import mpz
>>> a=mpz(7)
>>> bin(a)
'0b111'
>>> a=a.setbit(48)
>>> bin(a)
'0b1000000000000000000000000000000000000000000000111'
>>>

gmpy2 is the development version of gmpy and includes a new type called xmpz that allows more direct access to the bits.

>>> from gmpy2 import xmpz
>>> a=xmpz(7)
>>> bin(a)
'0b111'
>>> a[48]=1
>>> bin(a)
'0b1000000000000000000000000000000000000000000000111'
>>>

There are other solutions such as bitarray you might want to look at.

Disclaimer: I maintain gmpy and gmpy2.