How to run gunicorn inside python not as a command line?

if platform.uname().system.lower()=='linux':
    print("Detected Linux, Preparing gunicorn")        
    import gunicorn.app.base
    class StandaloneApplication(gunicorn.app.base.BaseApplication):

        def __init__(self, app, options=None):
            self.options = options or {}
            self.application = app
            super().__init__()

        def load_config(self):
            config = {key: value for key, value in self.options.items()
                    if key in self.cfg.settings and value is not None}
            for key, value in config.items():
                self.cfg.set(key.lower(), value)

        def load(self):
            return self.application

if __name__ == "__main__":
    # Use a debugging session in port 5001    
    if platform.uname().system.lower()=='linux':
        print("Detected Linux, Running Gunicorn")
        options = {
            'bind': '%s:%s' % ('0.0.0.0', '5001'),
            'workers': number_of_workers(),
            # 'threads': number_of_workers(),
            'timeout': 120,
        }
        initialize()
        StandaloneApplication(app, options).run()
    else:
        print("Detected non Linux, Running in pure Flask")
        initialize()
        app.run(debug=True, host=socket.gethostbyname(socket.gethostname()), port=5001)

import multiprocessing

from gunicorn.app.wsgiapp import WSGIApplication


class StandaloneApplication(WSGIApplication):
    def __init__(self, app_uri, options=None):
        self.options = options or {}
        self.app_uri = app_uri
        super().__init__()

    def load_config(self):
        config = {
            key: value
            for key, value in self.options.items()
            if key in self.cfg.settings and value is not None
        }
        for key, value in config.items():
            self.cfg.set(key.lower(), value)


def run():
    options = {
        "bind": "0.0.0.0:8000",
        "workers": (multiprocessing.cpu_count() * 2) + 1,
        "worker_class": "uvicorn.workers.UvicornWorker",
    }
    StandaloneApplication("myproject.main:app", options).run()