key = RSA.generate(4096)
with open("/root/Desktop/private.pem", 'w') as content_file:
    content_file.write(key.exportKey('PEM'))
pubkey = key.publickey()
with open("/root/Desktop/PubKey_E27.pem", 'w') as content_file:
    content_file.write(pubkey.exportKey('PEM'))

private_key=crypto.load_privatekey(crypto.FILETYPE_PEM,open("/root/Desktop/private.pem","rb").read())
private_key.from_cryptography_key(private_key)

public_key=crypto.load_publickey(crypto.FILETYPE_PEM,open("/root/Desktop/PubKey_E27.pem","rb").read())
public_key.from_cryptography_key(public_key)