Error: While importing "marketplace", an ImportError was raised:

Nobody has claimed this yet.

Traceback (most recent call last):
File "/home/alexandrepaes/.local/lib/python3.8/site-packages/flask/cli.py", line 240, in locate_app
__import__(module_name)
File "/home/alexandrepaes/Documents/projects websites apps ideas all/grpc-python-flask-microservices/marketplace/marketplace.py", line 4, in
import grpc
ModuleNotFoundError: No module named 'grpc'

This couple of lines below comment has been added up temporaly to fix an importation issue of the grpc when running: FLASK_APP=marketplace.py flask run
even after hard installed it and also added it up to this own directory's requirements.txt with pip install instead a simple import

if __name__ == '__main__':
app.run('localhost',50052, debug=True)

Addiional information: Below ate the parameter on marketplace.py that I think that might be misconfigured and causing the bug:

recommendations_host = os.getenv("RECOMMENDATIONS_HOST", "localhost")
recommendations_channel = grpc.insecure_channel(
f"{recommendations_host}:50051" # Already tried port 50052 here but didn't work either.
)
recommendations_client = RecommendationsStub(recommendations_channel)

Start with marketplace/marketplace.py and its requirements.txt, then reproduce the reported command: FLASK_APP=marketplace.py flask run. Check why importing grpc fails despite the dependency being installed; done means the marketplace app imports and starts without the reported ImportError.

Written by the indexing model from the issue text.