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Added python app

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# Day 47 - Let's build an App in Python # Day 47 - Let's build an App in Python
Let's create a simple blog app with the help of [Flask](https://flask.palletsprojects.com/en/2.2.x/) that supports posts in [markdown.](https://www.markdownguide.org/basic-syntax/)
## Initiating virtual env and installing packages
Let's create a directory for our blog project. After you have created your project directory, create virtual environment using the following commands:
- Windows
``` bash
```
- Linux//MacOs
``` bash
```
Now let's use `pip` to install required modules and packages that we will be using in this project.
``` bash
pip install flask markdown
```
## Creating the flask app
First, create a new Flask app:
``` python
from flask import Flask, render_template
import markdown
app = Flask(__name__)
```
Define a route for the home page:
``` python
@app.route('/')
def home():
return render_template('index.html')
```
Create a directory called posts and add some Markdown files with blog post content.
Define a route to handle requests for individual blog posts:
``` python
@app.route('/posts/<path:path>')
def post(path):
with open(f'posts/{path}.md', 'r') as file:
content = file.read()
html = markdown.markdown(content)
return render_template('post.html', content=html)
```
Create templates for the home page and individual blog posts:
- `home.html`:
``` html
<!DOCTYPE html>
<html>
<head>
<title>My Blog</title>
</head>
<body>
<h1>My Blog</h1>
{% for post in posts %}
<h2><a href="/posts/{{ post }}">{{ post }}</a></h2>
{% endfor %}
</body>
</html>
```
- `post.html`:
``` html
<!DOCTYPE html>
<html>
<head>
<title>{{ title }}</title>
</head>
<body>
<h1>{{ title }}</h1>
<div>{{ content|safe }}</div>
</body>
</html>
```
Modify the home route to display a list of blog post titles:
``` python
@app.route('/')
def home():
posts = []
for file in os.listdir('posts'):
if file.endswith('.md'):
title = file[:-3]
posts.append(title)
return render_template('index.html', posts=posts)
```