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ModuleNotFoundError: No module named ‘app’ fastapi docker

FROM python:3.8
WORKDIR /app 

COPY requirements.txt /
RUN pip install --requirement /requirements.txt

COPY ./app /app

EXPOSE 8000
CMD ["uvicorn", "app.main:app", "--host=0.0.0.0" , "--reload" , "--port", "8000"]

when i used

docker-compose up -d
ModuleNotFoundError: No module named ‘app’

  • the folders in Fastapi framework:

  • fastapi

    • app

      -main.py

  •    language_detector.py
    
  • Dockerfile

  • docker-compose

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Answer

CMD ["uvicorn", "main:app", "--host=0.0.0.0" , "--reload" , "--port", "8000"]

Your work directory is /app and the main.py file is already there. So you don’t need to call app.main module. Just call main.py script directly in CMD.

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