Question
No application module specified deploying flask app
- Posted November 16, 2020
- PythonFlaskDeployment
Hello, i must say this is my first project. Now I built a flask app, that uses a image classifier. the flask integration works fine locally, but i would like to deploy the app to a lager audience.
i followed the deployment strategy proposed on this git https://github.com/digitalocean/sample-flask.git but i get the following error:
number-reader | 12:12:52 usage: gunicorn [OPTIONS] [APP_MODULE] number-reader | 12:12:52 gunicorn: error: No application module specified.
app = Flask(__name__)
# To setup Bootstrap templates
Bootstrap(app)
# Load trained model
with open("model/classifier.pickle", "rb") as handle:
classifier = pickle.load(handle)
@app.route('/', methods=['GET', 'POST'])
def load_image():
if request.method == 'POST':
if __name__ == '__main__':
app.run(debug=True)
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Try something like this in settings->components->your component:
gunicorn --worker-tmp-dir /dev/shm app:app
The first part is something that digitalocean suggests: “”“Gunicorn crashes with PermissionError unless launched with a specific argument due to an issue with Gunicorn running in Docker. To resolve, run Gunicorn to use a different location for its temp files by passing this option to the run command: gunicorn --worker-tmp-dir /dev/shm project.wsgi”“”
But it worked for me changing the project.wsgi for app:app (it is what I use on my local machine for testing, since my app file is called app.py)