flask-beginners

My personal repo for building web applications with Flask. Nothing fancy - just teaching myself something new.

Following along the courses provided by Anthony H. located here

Code and tutorials also on GitHub and YouTube - highly recommended!

Virtual Environment

This Flask project was built on Windows 10 using a virtual environment. See the following guides:

Pipenv & Virtual Environments - see Lower level: virtualenv

Creation of virtual environments - see instructions for Windows

Of course, you can do the same in MacOS or Linux following instructions for those platforms. Also, pipevn if you prefer.

Commands

Initialize virtual environment

c:\>python -m venv c:\path\to\env

Activate virtual environment

C:\Users\SomeUser\project_folder> env\Scripts\activate

To stop the virtual environment

deactivate

Launch Flask - see Flask Quick Start

flask run

Tip: If there are .env or .flaskenv files present (as in the "Flask for Beginners" tutorial), run command "pip install python-dotenv" to use them.

Adding HTML to a Page

For your first time with Flask, most tutorials start with Hello World like this:

@app.route('/')
def index():
    return 'Hello World!'

Beyond returning a line of text, your next step is to add proper HTML to each page.

@app.route('/')
def index():
    return '''
        <html>
            <body>
                <p>Welcome to My Flask App</p>
                <form>
                    <p><input name="number1" /></p>
                    <p><input name="number2" /></p>
                    <p><input type="submit" value="Do calculation" /></p>
                </form>
            </body>
        </html>
    '''

darrell24015/flask-beginners

flask-beginners

Virtual Environment

Commands

Adding HTML to a Page