There are several methods of converting numbers to and from strings in python.
converting strings to numbers
nr = int(txt, base)
converting numbers to strings
using string formatting:
txt = "%#03d" % nr
txt = "%#03x" % nr
txt = "%#03o" % nr
txt = "{0:#03b}".format(nr)
txt = "{0:#03o}".format(nr)
txt = "{0:#03x}".format(nr)
txt = "{0:#03d}".format(nr)
using specialized functions:
txt = bin(nr)
txt = hex(nr)
txt = oct(nr)
using python3 integer from_bytes and to_bytes methods:
nr = int.from_bytes(a2b_hex(txt), "little")
txt = b2a_hex(nr.to_bytes(16, "little"))
somewhat related:
nr.bit_length()
