Run Python Application with Docker

You can run a Python script using Docker containers. This tutorial will help you to run a Python script over command line within Docker isolated environment.

Run Python Example within Docker

Create Python Script – First, create a sample Python script to run on web server under the Docker container. Edit script.py in your favorite text editor.
```
nano script.py
```
Add the following content:
Python
print("Welcome to Tecadmin.net"); print("This is Python running in Docker");
1
2
print("Welcome to Tecadmin.net");
print("This is Python running in Docker");
Create Dockerfile – Next create a file named Dockerfile under the same directory. Edit Dockerfile in a text editor:
```
nano Dockerfile
```
Add below content to file.
```
FROM python:3
WORKDIR /usr/src/app

## Un-comment below lines to install dependencies
#COPY requirements.txt ./
#RUN pip install --no-cache-dir -r requirements.txt

COPY . .
CMD [ "python", "./script.py" ]
```
Here you can choose your preferred Python version and operating systems for your Docker container.
Build Image – You have a Dockerfile and a sample script.py Python script in your current directory. Now, you need to create a docker image with these files. Execute below command to build and crate Docker image.
```
docker build -t img-python-example .  
```
The above command will create a Docker image with name img-python-example.
Run Container –Now, you have a docker image now. Use this docker image to launch a new container on your system. To run your Docker container using the newly created image, type:
```
docker run --rm -it img-python-example
```
You can use “-d” option to run as demon mode.

Dockefile, Docker, Python