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How to Run Python on Docker

How to Run Python on Docker

Docker is a popular platform for developing, deploying, and running applications in containers. It provides an isolated environment for running applications without affecting the underlying system. Python is a widely-used programming language known for its simplicity, readability, and flexibility. In this article, we will explore how to run Python on Docker, including installation and configuration.

Step 1: Install Docker

Before we can start running Python on Docker, we need to install Docker. Docker provides installation packages for all major operating systems, including Windows, macOS, and Linux. You can download the appropriate package from the official Docker website and follow the installation instructions.

Step 2: Create a Dockerfile

A Dockerfile is a script that contains instructions for building a Docker image. To run Python on Docker, we need to create a Dockerfile that specifies the base image, installs Python, and copies our Python script into the container.

Here is an example Dockerfile:

FROM python:3.8-slim-buster
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
CMD [ "python", "./your-script.py" ]

In this Dockerfile, we are using the official Python 3.8 slim-buster image as the base image. We then set the working directory to /app and copy the requirements.txt file into the container. We install the required packages using pip, copy our Python script into the container, and finally, specify the command to run the script.

Step 3: Build the Docker Image

Now that we have created the Dockerfile, we can use it to build a Docker image. Open a terminal or command prompt and navigate to the directory containing the Dockerfile. Run the following command to build the Docker image:

docker build -t my-python-app .

This command tells Docker to build an image with the tag "my-python-app" using the Dockerfile in the current directory.

Step 4: Run the Docker Container

Once the Docker image is built, we can run it in a Docker container. Run the following command to start a new container:

docker run --rm -it my-python-app

This command tells Docker to start a new container using the "my-python-app" image, and the --rm option tells Docker to remove the container when it stops running. The -it option starts the container in interactive mode, allowing us to see the output of the script.

Step 5: Test the Python Script

Now that we have our Python script running in a Docker container, we can test it by running some sample code. Open a new terminal or command prompt and run the following command to start a new container:

docker run --rm -it my-python-app python -c "print('Hello, Docker!')"

This command tells Docker to start a new container using the "my-python-app" image and run a simple Python script that prints "Hello, Docker!".

In this article, we have explored how to run Python on Docker, including installation and configuration. Docker provides a convenient and isolated environment for running Python applications, making it easy to deploy and manage applications in containers. We hope this article has been helpful and that you are now ready to start running Python on Docker.

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  • That's it for this post. Keep practicing and have fun. Leave your comments if any.

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