$ python3 -m pywgkey --help
Usage: python -m pywgkey [OPTIONS] WANTED_STRING

  Generate WireGuard keypair containing specified wanted string.

Options:
  -b, --begining  If the pubkey must start with the string.
  -w, --write     Write keys to files.
  -p, --psk       Genarate a preshared key as well.
  --help          Show this message and exit.

$ python -m pywgkey test
Your public key is:  1f810nNMhOB8mYpGbEvDwmXTeStPMycLiHpw0/CeL1c=
Your private key is: 75C5ahPr5UY3paWXvLRKd82EK7KWuDDJ0D9h7/p21Us=

$ python -m pywgkey test -w
Keys have been writen to test.pub and test.priv
$ cat test.pub
1f810nNMhOB8mYpGbEvDwmXTeStPMycLiHpw0/CeL1c=
$ cat test.priv
75C5ahPr5UY3paWXvLRKd82EK7KWuDDJ0D9h7/p21Us=

$ python -m pywgkey test -b
Your public key is:  TEsTtKLgqud0Yohg8geFKcnGy99xFzZlMvSv2YbwT1Y=
Your private key is: paknyfh/d0LhZP2LqtjzJs2UE6XwaN14irxFdLV6d94=