input: from Crypto.PublicKey import RSA
  
  def generate_key_pair():
      """ Generate and save RSA public/private key pair to 'public.pem' and 'private.pem' files, respectively. 
      Example:
      >>> generate_key_pair()
      (No explicit return value, but files 'public.pem' and 'private.pem' will be generated)
      """
output:     key = RSA.generate(2048)
      private_key = key.export_key()
      with open("private.pem", "wb") as f:
          f.write(private_key)
      public_key = key.publickey().export_key()
      with open("public.pem", "wb") as f:
          f.write(public_key)