tool wanted: to convert utf8 <-> unicode in hex

[Skaperen]

so how does this convert to utf8?

>>> chr(int('0x42f', 16))
'Я'

what non-python tool does it use to do such conversion?

what program is this being run under? out of speculation, i tried running this under python3.5.2 but did not get the same results:

Output:
lt1/forums /home/forums 11> python3
Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> chr(int('0x42f', 16))
'\u042f'
>>> 
lt1/forums /home/forums 12>

i am going to be running this to verify if i am getting the correct conversion in python. ideally this would be a command that has the actual conversion code in it. so there woul e some form of bit operations or the arithmetic equivalent (*2 is like a left shift of 1)