Python For Web Development Pdf Page
from django.http import HttpResponse from django.urls import path def hello_world(request): return HttpResponse("Hello, World!") urlpatterns = [ path("", hello_world, name="hello_world"), ] Let’s build a simple web application using Flask. We’ll create a blog that allows users to create, read, update, and delete (CRUD) posts. Step 1: Install Dependencies Install the required dependencies using pip:
pip install flask flask-sqlalchemy Create a database using SQLAlchemy:
post = Post.query.get_or_404(post_id) if request.method == "POST": post.title = request.form["title"] post.content = request.form["content"] db.session.commit() return redirect(url_for("index")) return render_template("update.html", post=post) @app.route(“/delete/ int:post_id ”) def delete(post_id): python for web development pdf
”`python @app.route(“/”) def index():
if request.method == "POST": post = Post(title=request.form["title"], content=request.form["content"]) db.session.add(post) db.session.commit() return redirect(url_for("index")) return render_template("create.html") @app.route(“/update/ int:post_id ”, methods=[“GET”, “POST”]) def update(post_id): from django
posts = Post.query.all() return render_template("index.html", posts=posts) @app.route(“/create”, methods=[“GET”, “POST”]) def create():
post = Post.query.get_or_404(post_id) db.session.delete(post) db.session.commit() return redirect(url_for("index")) Here’s an example of a simple “Hello, World
from flask import Flask app = Flask(__name__) @app.route("/") def hello_world(): return "Hello, World!" if __name__ == "__main__": app.run() Django is a high-level framework that provides an architecture, templates, and APIs for building complex web applications. Here’s an example of a simple “Hello, World!” application using Django:
