Converting a value into 4 byte hex in python

Question

I want to convert any value (that can be negative or positive) into hex. My current method does this.

The read value in this example is 4003.

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Answer 1

You want the struct module:

>>> struct.pack("<I", 4003).encode('hex')
'a30f0000'

For -2, you'll need to do some other work:

>>> struct.pack("<I", -2 + 2**32).encode('hex')
'feffffff'

A way to do it for any value is:

struct.pack("<I", (value + 2**32) % 2**32).encode('hex')