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Comment by Siddarthan Sarumathi Pandian on "What's the best practice for building Docker for Python — using requirements file OR installing individually?" | Hashnode

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Siddarthan Sarumathi Pandian

Full Stack Dev at Agentdesks | Ex Hashnode | Ex Shippable | Ex Altair Engineering

Apr 19, 2017

I do not know much about Python, but I have built a few python images when I was just starting out with Docker. IIRC, I used the requirements.txt file since it's sort of similar to the package.json file in JavaScript. Installing packages manually is going to be a hassle, yes?

Roopak A N

Full Stack Engineer

Apr 20, 2017

When I said manually, I meant, it will be part of Docker file.

Yes, it would be a little hassle to maintain both requirements.txt file and Dockerfile, but, to optimise the build time, I feel that installs should be part of Dockerfile.

I have similar approach for package.json also.

Any change in package.json/requirements.txt file will trigger download and install of all the packages, which I feel is a bad way to build a Docker.

Roopak A N

Full Stack Engineer

Apr 20, 2017

If the packages are small, then the build time will not be an issue. But, if packages are large like OpenCV, Pandas, Numpy, etc, then every change in the file - build time will be huge everytime.