Have you had experience working with mechanisms for enabling and disabling features in applications (feature toggles)?

Feature toggles that enable and disable functions allow for dynamic management of application capabilities without the need to change code or restart the service. In Python, this is often implemented through configuration files, environment variables, or special libraries.

An example of a simple feature toggle using an environment variable:

import os

def new_feature():
    print("New feature is active")


def main():
    if os.getenv('FEATURE_NEW', 'off') == 'on':
        new_feature()
    else:
        print("Using old logic")

if __name__ == '__main__':
    main()

This approach allows enabling or disabling features without changing the code, which is convenient for phased releases, A/B testing, and quick rollback of changes.