Changing the indexing order of BitArray in Python

Question

I am using a BitArray in my python script, and I was wondering if there is a way to change the indexes order of the BitArray that I create. Right now the indexes are from 0 to N-1 where N is the number of bits. Is there away to change the indexes to go from N-1 to O?

dataBits = BitArray('0b10100000')
print(dataBits[0])

This above two lines return the first bit True because the order of indexes is from 0 to N-1. Can I change the order of indexes for this to return the last bit False?

It may be effective to subclass the BitArray class and add a custom method that allows you to achieve that — glotchimo
– glotchimo, Commented Nov 14, 2019 at 17:39
Is it acceptable to reverse the bits before you create your BitArray? IE: dataBits = BitArray('10100000'[::-1])? Otherwise, you should subclass and implement your own __getitem__ and __iter__ methods. The first is preferable since there might be other methods in BitArray that depend on the order and might lead to "unexpected" behavior. Also, where is the documentation for the BitArray library you're using? — SyntaxVoid
– SyntaxVoid, Commented Nov 14, 2019 at 17:48

Ayberk Özgür · Accepted Answer · 2022-11-29 09:51:54Z

0

Yes. What you're looking for is the module variable lsb0:

bitstring.lsb0 = True
dataBits = bitstring.BitArray('0b10100000')
print(dataBits[0])

Prints out False.

answered Nov 29, 2022 at 9:51

Ayberk Özgür

5,3344 gold badges41 silver badges66 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Changing the indexing order of BitArray in Python

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related