How to update Docker interpreter when requirements.txt is updated?

创建于 2023年01月26日 14:33

I have managed to get a Docker interpreter working in PyCharm and now I want to install a new library. Normally, when using a venv I would just go and add the library to requirements.txt, that lists the project dependencies, and then

 pip install requirements.txt

to update the environment with the added library. However, now I'm using a Docker environment, I'm not sure what to do after updating requirments.txt with the new library. I expected that PyCharm would detect the update to requirements.txt and use this to build a new image when I next spin up an instance (e.g. run or new interpreter), but it did not and the new library is not available. On the other hand, pip installing in the Docker instance would only work for the current instance as the changes would be lost as soon as a new instance is spun up. So what are the correct workflow steps here after updating requirements.txt?

3 条评论

Daniil Bogdanov

创建于 2023年01月27日 09:38

Hello,

Usually, a good practice to add lines like this to the Dockerfile:

COPY . /opt/app
WORKDIR /opt/app
RUN pip install -r requirements.txt

You can modify them to fit your project/image structure, but the common idea is to copy your requirements.txt to the image and then run pip install against it every time you rebuild the image.

This also makes your Dockerfile universal and allows you to use it outside your dev environment.

Seanos

创建于 2023年01月27日 10:52

Hi Daniil,

This is what I have in my Dockerfile:

FROM python:3.11-slim-buster

WORKDIR /app

# Dependencies, copied first to take advantage of caching.
COPY requirements.txt /app/requirements.txt
RUN pip install -r requirements.txt

# Copy the rest of the files.
COPY . /app

However, now when I update requirements.txt with a new library and launch a new interpreter, it seems to be using the old build and so the library is not installed. Is there a way to have PyCharm detect changes to requirements.txt and rebuild the image automatically?

Daniil Bogdanov

创建于 2023年01月31日 14:04

Oh, I see, but I can't reproduce the issue, and changes in requirements.txt affect image building.

Could you please clarify if you are using a docker or a docker-compose interpreter?

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