Python Flask App for Get SH>IT Done

docker build -t flask .

docker run --rm -d -p44444:80 flask

docker run --rm -d -p80:80 flask

python main.py

There is a main.py Python file that exposes the application and its variables:

from flask import Flask, request, render_template
import os

app = Flask(__name__)

@app.route('/', methods=['GET'])
def index():
  return render_template("index.html")

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=80)

This piece of code is stored in our main.py:

• Line 1-2: here we are importing the Flask module and creating a Flask web server from the Flask module
• Line 4: __name__ means this current file. In this case, it will be main.py. This current file will represent the web application. We are creating an instance of the Flask class and calling it app. Here we are creating a new web application
• Line 6: it represents the default page or mounting point
• Line 7–8: when the user goes to the website and they go to the default page (nothing after the slash), then the function below will get activated by rendering a template called index.html
• Line 10: when we run our Python script, Python assigns the name __main__ to the script when executed
• Line 11: this is optional and describes which IP and port will be used by the Flask application

Some of the key commands are:

• app.route(“/”) - adds more routes to the path with more files

@app.route("/home")
def home():
    return "Hello, World!"
    
@app.route("/julibcn")
def julibcn():
    return "Hello, JuliBCN"

• templates - the Flask Framework looks for HTML files in a folder called templates. We need to create a templates folder and put all HTML files in there
• render_template() - we import render_template() method from the flask framework. render_template() looks for a template (HTML file) in the templates folder.
• static - in the same way as we created a folder called templates to store all our HTML templates, we need a folder called static. In static, we will store our CSS, JavaScript, images, and other necessary files. That is why it is important to create a CSS folder to store stylesheets