How do I manage Python dependencies in a Docker container?

How do I manage Python dependencies in a Docker container?

You can manage Python dependencies in a Docker container by using a requirements.txt file and the COPY command in your Dockerfile.

Can you show me an example of a Dockerfile that does this?

Sure! Here's a simple example:

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 using the RUN command in your Dockerfile. For example:

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

Is there a way to optimize the image size?

Yes! You can optimize the image size by using a multi-stage build or by minimizing the number of layers in your Dockerfile.