title: check if a Firebase App is already initialized in python
body: <p>I get the following error: </p>
  
  <p><code>ValueError: The default Firebase app already exists. This means you called initialize_app() more than once without providing an app name as the second argument. In most cases you only need to call initialize_app() once. But if you do want to initialize multiple apps, pass a second argument to initialize_app() to give each app a unique name.</code></p>
  
  <p><strong>How Can I check if the default firebase app is already initialized or not in python?</strong></p>