title: I want to created a rsa key put want to return single key at a time for models
body: <pre><code>def Create_Keys():
      publicKey, privateKey = rsa.newkeys(512)
  </code></pre>
  <p>For Models</p>
  <pre><code>PublicKey = models.CharField(max_length=1000, blank=True, default=#From Function create Keys publicKey)
  PrivateKey = models.CharField(max_length=1500, blank=True, default=#From Function create Keys privateKey)
  </code></pre>
  <p>To make Like this</p>
  <pre><code>hidden_url = models.CharField(max_length=20, blank=True, 
                                default=utlis.create_random_codes()
                               )
  </code></pre>