TypeError: '>=' not supported between instances of 'int' and 'str'

[buran]

You have problem sending the public key from the server. You send a str representation of PublicKey instance. Then on client side after decoding you just take first 2 char from that str and try to use them when encrypt you password message
not tested, but try

in server replace line 56 msg = f'{pkey}' with msg = pkey.hex()
in client replace line 13 serverkey = s.recv(1024).decode() with serverkey = PublicKey.from_hex(s.recv(1024).decode())
note, you need to import PublicKey before use it

and then line 15 will become msg = f'PSWD{RSA.Message.from_hex(new_pass).encrypt(serverkey)}'

Also, not sure you want to use Message.from_hex() to create message for the new password.


ALSO, Same apply when sending client public key to server - try to make same changes on your own, otherwise you will get the same error when server try to use client public key.