How can I manage Python dependencies in Docker?

How can I manage Python dependencies in Docker?

You can manage Python dependencies in Docker by using a requirements.txt file and a Dockerfile.

Can you show me an example of a Dockerfile that uses a requirements.txt?

Sure! Here's a simple Dockerfile:

FROM python:3.9

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY . .
CMD ["python", "app.py"]

What if I need to install system packages as well?

You can install system packages by adding a RUN command in your Dockerfile before installing Python dependencies. For example:

RUN apt-get update && apt-get install -y <package-name>

How do I rebuild the Docker image after changing the requirements?

You can rebuild the Docker image by running docker build -t your-image-name . in the directory containing your Dockerfile.