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Added Pipfile to async scraper in section12; PDF to section13; and Flask project in section14.
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‎.gitignore

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Subtitles
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documents/
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.env/
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logs.txt

‎section12/projects/async_scraping/Pipfile

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[[source]]
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url = "https://pypi.python.org/simple"
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verify_ssl = true
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name = "pypi"
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[packages]
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aiohttp = "==3.0.5"
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requests = "==2.18.4"
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beautifulsoup4 = "==4.6.0"
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[dev-packages]
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‎section12/projects/async_scraping/Pipfile.lock

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‎section13/using_pipenv.pdf

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‎section14/projects/first-flask-app-lectures/1-first-flask-endpoint/app.py

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from flask import Flask
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# We create a new Flask app with a unique name (normally we use '__main__' since that's always unique across all files imported in the project).
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app = Flask(__name__)
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# This decorator registers the '/' route with our app.
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# When a user visits the '/' route (which is the homepage), the home() function will execute.
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@app.route('/')
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def home():
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"""
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This function will run when the user visits the '/' route (the homepage).
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It just returns 'Hello, world!' as any good first application should!
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"""
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return 'Hello, world!'
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# Only run the code inside the if statement if we've execute this file.
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# We don't want to run our app if we have imported this file, as running the app
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# would block and prevent importing this file, since it runs until the app is shut down.
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if __name__ == '__main__':
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# Run the app.
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# The debug=True flag is just here for development purposes.
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# It gives us more information if an error happens.
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app.run(debug=True)

‎section14/projects/first-flask-app-lectures/2-returning-information/app.py

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from flask import Flask
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app = Flask(__name__)
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posts = {
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0: {
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'title': 'Hello, world',
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'content': 'This is my first blog post!'
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}
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}
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@app.route('/')
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def home():
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return 'Hello, world!'
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# This route expects to be in the format of /post/0 (for example).
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# Then it will pass 0 as argument to the post() function.
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@app.route('/post/<int:post_id>')
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def post(post_id):
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"""
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This function runs when a user visits route such as:
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- /post/0
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- /post/2
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- /post/99
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But not:
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- /post/a
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- /post/something/else
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- /posts/1
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Then we get the 0 as a number (not a string!) as argument, so we can use it.
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"""
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post = posts.get(post_id) # Retrieve the post from our global posts dictionary by the ID passed in as argument.
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return f"Post {post['title']}, content:\n\n{post['content']}" # Return the title and content formatted a bit nicer.
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if __name__ == '__main__':
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app.run(debug=True)

‎section14/projects/first-flask-app-lectures/3-rendering-html/app.py

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from flask import Flask, render_template
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app = Flask(__name__)
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posts = {
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0: {
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'title': 'Hello, world',
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'content': 'This is my first blog post!'
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}
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}
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@app.route('/')
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def home():
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return 'Hello, world!'
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@app.route('/post/<int:post_id>')
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def post(post_id):
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"""
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This function renders a template from the `templates` folder in the directory of app.py.
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It will find the `post.jinja2` template and render it with the data passed in.
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Look at `post.jinja2` for information on how the variable `post` gets used there.
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"""
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return render_template('post.jinja2', post=posts.get(post_id))
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if __name__ == '__main__':
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app.run(debug=True)

‎section14/projects/first-flask-app-lectures/3-rendering-html/templates/post.jinja2

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<!DOCTYPE html>
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<head></head>
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<body>
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<!-- This is a HTML comment, so it doesn't get executed by the browser! -->
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<!-- The below are variables that will get replaced by their values (as if they were Python). They must be inside {{ }} in order to do that. -->
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<h1>{{ post['title'] }}</h1>
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<p>{{ post['content'] }}</p>
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</body>
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</html>

‎section14/projects/first-flask-app-lectures/4-error-pages/app.py

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from flask import Flask, render_template
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app = Flask(__name__)
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posts = {
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0: {
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'title': 'Hello, world',
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'content': 'This is my first blog post!'
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}
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}
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@app.route('/')
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def home():
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return 'Hello, world!'
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@app.route('/post/<int:post_id>')
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def post(post_id):
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post = posts.get(post_id)
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# If the post was not found, then we can render a different page instead—the user will see an error page.
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if not post:
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# Here we pass another variable, the string `message`.
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# It can be used inside the jinja template.
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return render_template('404.jinja2', message=f'A post with id {post_id} was not found.')
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return render_template('post.jinja2', post=post)
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if __name__ == '__main__':
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app.run(debug=True)

‎section14/projects/first-flask-app-lectures/4-error-pages/templates/404.jinja2

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<!-- Use the base.jinja2 template. We can then override blocks defined there and "fill them in". -->
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{% extends 'base.jinja2' %}
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<!-- Replace the `content` block with whatever we put inside it... -->
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<!-- In this case a title saying "404", and the contents of the `message` variable. -->
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{% block content %}
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<h1>404 — Post not found</h1>
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<p>{{ message }}</p>
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{% endblock %}

‎section14/projects/first-flask-app-lectures/4-error-pages/templates/base.jinja2

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<!DOCTYPE html>
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<head></head>
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<body>
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<!-- This is a generic Jinja2 template which defines a block. It doesn't use any variables (so it won't actually show any content.) -->
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<!-- Other templates can however fill in this block with their own content. That means we won't need to duplicate e.g. `DOCTYPE`.-->
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{% block content %}
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{% endblock %}
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</body>
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</html>

‎section14/projects/first-flask-app-lectures/4-error-pages/templates/post.jinja2

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<!-- Use the base.jinja2 template. We can then override blocks defined there and "fill them in". -->
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{% extends 'base.jinja2' %}
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<!-- Replace the `content` block with whatever we put inside it... -->
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<!-- In this case, a title with the `post['title']` and a paragraph with the `post['content']`. -->
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{% block content %}
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<h1>{{ post['title'] }}</h1>
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<p>{{ post['content'] }}</p>
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{% endblock %}

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