Convert negative integer to two's complement supporting hex in python

Question

I'm trying to reverse engineer a twos complement GPS code, where the GPS code is a representation of a two's complement number in hex.

For example, 0xFEA1C83D is -22951875 in decimal.

Using Python, how can I convert -22951875 into 0xFEA1C83D?

Have you looked at https://stackoverflow.com/questions/1604464/twos-complement-in-python? — sevenr, May 20 '20 at 16:33

score 1 · Accepted Answer · answered May 20 '20 at 16:38

1

You can use int.to_bytes and binarray.hexlify:

import binascii
binascii.hexlify((-22951875).to_bytes(4, byteorder="big", signed=True))
# b'fea1c83d'

answered May 20 '20 at 16:38

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1 Answers1