Shiny for Python with VSCode from A to Z

R Shiny with Loan

Introduction

Shiny makes it easy to build interactive web applications with the power of Python’s data and scientific stack.

Approachable: Write your application in Python; no web development skills required. Flexible: Built from the ground up to support custom layouts, styles, and the modularity required for full-fledged applications, all from Python. Performance: Uses creativity to efficiently handle data processing and minimize expensive re-computations.

Step by step

1. Installing Python

Before you go any further, Make sure you already installed Python and that the expected version is available from your command line. You can check this by running:




Unix/macOS

python3 --version or python --version

The result will be like this



Windows

py --version

If you don’t have python yet, go head and install it.

2. Installing Shiny

Install with pip

1. If you want to use a virtual environment, create/activate one now. If not skip this step




# Create a virtual environment in the .venv subdirectory
python3 -m venv venv

# Activate the virtual environment
source venv/bin/activate




2. Install shinylibrary.




Open terminal type pip install shiny and pip install --upgrade shiny htmltools. You can use pip list to list all of library you installed with pip.

You may on occasion need to force installation of updated versions of our packages, since they are in development pip install --upgrade shiny htmltools

Install with conda

1. If you want to use a virtual environment, create/activate one now. If not skip this step




# Create a conda environment named 'myenv'
conda create --name myenv

# Activate the virtual environment
conda activate myenv




2. Install shinylibrary.
   
   Open terminal type conda install -c conda-forge shiny and conda update -c conda-forge shiny

3. Installing VSCode

a. Install vscode




Going to https://code.visualstudio.com/ to install vscode




b. Install shiny extension




After you install vscode, open it, go to Extension the red square, type shiny, then install Shiny for Python

4. Start create Shiny app for Python.

a. Create a directory for shiny app. Let’s try “myshinyapp_python”




# Open terminal type
mkdir myshinyapp_python
cd myshinyapp_python




b. Create shiny app




We are in directory myshinyapp_python, I create a shiny app name first_python_app

shiny create first_python_app

Now you can go to the myshinyapp_python/first_python_app, you will see the file name app.py









c. Running app.py on vscode or browser




Vscode




Go to file and open the app.py









Click the Run button (square in yellow in the screenshot below) becomes “Run Shiny App”.









Browser




# Open terminal 
shiny run --reload first_python_app/app.py







Enter http://127.0.0.1:8000 on browser

5. Deploy the Python App on shinyapps.io

a. Install rsconnect-python




pip install rsconnect-python




b. Generate manifest file




rsconnect write-manifest shiny first_python_app







You will see 3 files in your directory first_python_app




first_python_app/
   app.py
   manifest.json
   requirements.txt




c. Get token from shinyapps.io












Copy the codes in purple box in your terminal




d. Configure rsconnect-python




# guide to deploy app
rsconnect deploy shiny --help









e. Deploy the first_python_app with a title first_python_app_test




# deploy the app 
rsconnect deploy shiny first_python_app --name loanrobinsonscientist --title first_python_app_test










Thank you for reading