Docker samples for Python.

May 19, 2022 - CMD [ "python3", "-m" , "flask", "run", "--host=0.0.0.0"] supply the command to run that will launch the server, and make it accessible outside of the container ... # syntax=docker/dockerfile:1 # base python image for custom image FROM python:3.9.13-slim-buster # create working directory and install pip dependencies WORKDIR /hello-py COPY requirements.txt requirements.txt RUN pip3 install -r requirements.txt # copy python project files from local to /hello-py image working directory COPY .

November 3, 2021 - Create a Dockerfile file describing a simple Python container.

September 11, 2025 - It is a plain text file with instructions and arguments. Here is the description of the instructions we’re going to use in our next example: ... You can check Dockerfile reference for more details.

ENV PYTHONUNBUFFERED=1 #Add dependencies for adduser RUN apt update -y && apt install adduser -y WORKDIR /app # Create a non-privileged user that the app will run under. # See https://docs.docker.com/go/dockerfile-user-best-practices/ ARG UID=10001 RUN adduser \ --disabled-password \ --gecos "" \ --home "/nonexistent" \ --shell "/sbin/nologin" \ --no-create-home \ --uid "${UID}" \ appuser # Download dependencies as a separate step to take advantage of Docker's caching.

FROM python:2 WORKDIR /usr/src/app COPY requirements.txt ./ RUN pip install --no-cache-dir -r requirements.txt COPY . . CMD [ "python", "./your-daemon-or-script.py" ] Copy ... For many simple, single file projects, you may find it inconvenient to write a complete Dockerfile.

[node1] (local) root@192.168.0.38 /test $ vi Dockerfile ... Thus, our image would start building taking base as Ubuntu. ... Since, the base image was Ubuntu, we can run Ubuntu commands here. These commands above install python over Ubuntu.

September 20, 2021 - Although .dockerignore is not part of the Dockerfile, I think I should highlight the need to use it. Just like .gitignoreit serves as a list of files and folders you want to ignore. In this case, it means excluding them from your docker build context. This results in a faster build, smaller image, and increased security and predictability (you can exclude python cache, secrets, etc). For some cases, you could be saving hundreds of MB just by excluding your .git folder. #example of ignoring .git and python cache folder .git __pycache__

This sample application shows how you can deploy Dockerfile-based Python applications to Deis Workflow. $ git clone https://github.com/deis/example-dockerfile-python $ cd example-dockerfile-python $ deis create Creating Application... done, created actual-gatepost Git remote deis added remote available at ssh://git@deis-builder.deis.rocks:2222/actual-gatepost.git $ git push deis master Counting objects: 63, done.

April 19, 2024 - FROM python:3.12 RUN mkdir /usr/src/app COPY s3.py /usr/src/app COPY requirements.txt /usr/src/app WORKDIR /usr/src/app RUN pip install -r requirements.txt CMD ["python", "./s3.py"] Here’s what each line of this Dockerfile is doing:

December 16, 2025 - /app # Install any needed dependencies specified in requirements.txt RUN pip install --no-cache-dir -r requirements.txt # Make port 8080 available to the world outside this container EXPOSE 8080 # Define environment variable ENV NAME World # Run app.py when the container launches CMD ["python", "app.py"]

This will be really useful when you are using system dependent modules or ones that requires compiling etc. pycrypto, numpy are good examples of this type. With the above, the image built with Alpine comes to around ~90MB, a 8X reduction in size.

FROM python:3-alpine · WORKDIR /service · COPY requirements.txt . RUN pip install -r requirements.txt · COPY . ./ EXPOSE 8080 ·

# Dockerfile # Use an official lightweight Python image FROM python:3.12-slim # Set the working directory inside the container WORKDIR /app # Copy the Python script into the container's working directory COPY app.py . # Specify the command to run when the container starts CMD ["python", "app.py"] ... Hello, Docker World! While this example is basic, Docker's power shines in more complex scenarios.

July 23, 2025 - Inside the dockerfile we will start by first taking the python base image from docker hub. A tag latest is used to get the latest official python image. It is very important to set your working directory inside your container.

FROM python:3.8.0-alpine3.10 · # Python docker images: https://github.com/docker-library/docs/tree/master/python/ · USER root · · # Copy the src · WORKDIR /app · COPY src/ /app/src/ COPY ./requirements.txt /app · RUN ls -la /app · · # Install python dependencies ·

20 hours ago - See a complete example in the uv-docker-example project. Compiling Python source files to bytecode is typically desirable for production images as it tends to improve startup time (at the cost of increased installation time and image size). To enable bytecode compilation, use the --compile-bytecode flag: ... Alternatively, you can set the UV_COMPILE_BYTECODE environment variable to ensure that all commands within the Dockerfile ...

Create a file named Dockerfile in your working directory with the following: # Use Python 3.11 as base image FROM python:3.11-slim # Set the working directory in the container WORKDIR /app # Copy the current directory contents into the container ...

December 14, 2024 - Let’s create a simple Dockerfile for a Python application. This example assumes you have a Python script named app.py and a requirements.txt file containing the dependencies for your application.