>>> hex_string = "deadbeef"
Convert it to a string (Python ≤ 2.7):
>>> hex_data = hex_string.decode("hex")
>>> hex_data
"xdexadxbexef"
or since Python 2.7 and Python 3.0:
>>> bytes.fromhex(hex_string) # Python ≥ 3
b'xdexadxbexef'
>>> bytearray.fromhex(hex_string)
bytearray(b'xdexadxbexef')