Python - Decimal to Hex, Reverse byte order, Hex to Decimal

Question

I\'ve been reading up a lot on stuct.pack and hex and the like.

I am trying to convert a decimal to hexidecimal with 2-bytes. Reverse the hex bit order, then convert

Answer 1

To convert from decimal to hex, use:

dec = 255
print hex(dec)[2:-1]

That will output the hex value for 255. To convert back to decimal, use

hex = 1F90
print int(hex, 16)

That would output the decimal value for 1F90.

You should be able to reverse the bytes using:

hex = "901F"
hexbyte1 = hex[0] + hex[1]
hexbyte2 = hex[2] + hex[3]
newhex = hexbyte2 + hexbyte1
print newhex

and this would output 1F90. Hope this helps!