Is this lib can be used to convert pkcs8 key to pkcs1 key?

[w-Bro]

like openssl command

openssl rsa -pubin -in public_pkcs8.pem -RSAPublicKey_out -out public_pkcs1.pem

[mhils]

See the README:

Note: The Python Cryptographic Authority strongly suggests the use of pyca/cryptography_
where possible. If you are using pyOpenSSL for anything other than making a TLS connection
you should move to cryptography and drop your pyOpenSSL dependency.

The cryptography library should be able to do what you want. :)