How to Convert a Hexadecimal String to Bytes in Python?

How to Convert a Hexadecimal String to Bytes in Python

Converting a hexadecimal string, which represents various data values, to bytes allows you to extract specific values from raw data. Below are various methods to accomplish this in Python.

For instance, converting the string "ab" should result in the bytes b"xab" or its equivalent byte array.

Consider an example where you have a hex string:

8e71c61de6a2321336184f813379ec6bf4a3fb79e63cd12b

How do you convert it to bytes?

Methods:

Bytearray (Python 3 and 2.7):

import binascii

hex_string = "8e71c61de6a2321336184f813379ec6bf4a3fb79e63cd12b"
result = bytearray.fromhex(hex_string)
print(result) # Output: bytearray(b'\x8eq\xc6\x1d\xe6\xa22\x136\x18O\x813y\xeck\xf4\xa3\xfby\xe6<\xd1+')

Bytes Object (Python 3):

bytes_result = bytes.fromhex(hex_string)
print(bytes_result) # Output: b'\x8eq\xc6\x1d\xe6\xa22\x136\x18O\x813y\xeck\xf4\xa3\xfby\xe6<\xd1+'

String (Python ≤ 2.7):

hex_data = hex_string.decode("hex")
print(hex_data) # Output: "\xde\xad\xbe\xef"

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