[Python] Web application from 0! Hands-on (2) -Hello World-
Overview
I had the opportunity to create a web application from scratch with Python, so as a summary! This article describes how to do Hello World with API.
I want this person to read
- Those who have no programming experience but want to make an app
- New web programmers
- Experienced but never written a web app in Python
goal
The goal is to create a web app with CURD functionality using HTML, CSS, JavaScript, Python, and SQL.
Things necessary
- PC（Windows OS）
- Internet line
- Exciting feelings
1. Folder structure
The folders and files created this time are as follows.
todo/ └ api/ └ index.py
- Bottle A web framework is a major factor when creating a web application. Bottle is a lightweight web framework for Python. Bottle: Python Web Framework — Bottle 0.13-dev documentation There are other well-known frameworks such as Django and Flask, but this time I decided to use Bottle, which is lightweight and easy because it is small. It also supports an interface called WSGI. Normally, when you place a web application on a server, you have to consider various things, but you can make a web application quite easily! That is (roughly)
The features of each framework are for reference below.
- Django: Large scale, feature rich
- Flask: Small and medium sized, decent features, WSGI compliant
- Bottle: Small size, lightweight, WSGI compliant
3. Install Bottle
Open a command prompt as an administrator and execute the following command. Only this.
pip install bottle
4. Try Hello World
Create a working folder and open it with VS Code. Then, create the following folders and files. (.vscode is generated by VS Code without permission) todo/ └ api/ └ index.py
Then write the code in index.py.
index.py
# -*- coding:utf-8 -*-
#Load an external package
from bottle import route, run
# @to route/If set to hello, http://localhost:8080/Can be accessed with hello
@route('/hello')
def hello():
# Hello World!Returns the string
return "Hello World!"
#Web server execution configuration
#URL"http://[host]:[port]/[route]"Becomes the composition of
run(host='localhost', port=8080, debug=True)
Press F5 and select Python File.
http://localhost:8080/hello When you visit, you should see "Hello World!"!
Summary
As the first step of API implementation, I tried Hello World!
next time···
Connect to the database from the API!
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