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Event

Gentle Introduction to Developing modern web apps in R & Python 1.15pm - 4.15pm

Schedule and Deliverables: https://algorit.ma/kickstart-introduction-developing-modern-web-apps/

Web App template (download link): https://github.com/onlyphantom/darkershiny

Objective

  • What do we want in a "modern" web application?

    • Able to be hosted on cloud / physical
    • In a production app, it needs to be able to work with all kind of data sources
      • SQL, Oracle, Postgre, ...
      • APIs (twitter, facebook, google trends, wiki...)
    • Security
    • Responsive / Mobile-friendly
    • Generous and permissive license / Open-source
    • Administrative features
      • Account system
      • Log in / Log out
      • Mail servers
      • Admin features
    • Flexibility to incorporate JS / CSS elements as necessary
      • Example: integrate Bootstrap

  • How do we gain the skills required for objective #1

Tools

- Prerequisites: R, Python, Git
- Visual Studio Code
    - https://code.visualstudio.com/download
    - Alternatives: Atom, Sublime, Notepad++
- RStudio
    - https://www.rstudio.com/products/rstudio/download/
- SQL Editor
    - TablePlus (find a free alternative)
- GitHub
    - https://github.com
- Jupyter Notebook / Lab (installed through conda)
    - https://jupyter.org/install

Step by Step (R)

  1. The git url: https://github.com/onlyphantom/darkershiny has installation instruction and available to download as zip
    • git clone ...
  2. On your desktop (or anywhere you want), paste the git clone command into a terminal (command line / command prompt)
  3. Once completed, in the folder find app.R. Right click -> Open in RStudio
  4. Once opened in RStudio, click on the "Run app" button

Step by Step (Python)

  1. Create a virtual environment
  2. Create a new file on your computer, name it app.py
  3. Install flask into your environment
    • pip install flask or conda install flask
  4. Write the base template:
from flask import Flask
app = Flask()

@app.route('/')
def home():
    return 'Hello, this is home!'

app.run()
  1. In your terminal, run the app by doing flask run

Extra Resources:

- https://github.com/onlyphantom/lebaran