Flask/Run Flask Online

This lesson shows how to run Flask online using Repl.it.

Readings

1. Wikipedia: Flask (web framework)
2. Repl.it: Flask Tutorial Part 1

Activities

1. Run a Repl.it Python environment.
   • Open Repl.it: Python3 in a new tab or new window.
2. Add the Flask package.
   • Select Packages on the left.
   • Search for Flask.
   • Add Flask.
3. Display Hello world!
   • Add the following code to main.py:
     import flask

app = flask.Flask(__name__)

@app.route('/')
def home():
    return "Hello world!"

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=5000)
   • Run the program.
   • Refresh the output window.
   • Stop the program.
4. Modify Flask output.
   • Customize the return line to display Hello name!, where name is your name.
   • Run the program and refresh the output window to see your changes.
   • Stop the program.

References

• Repl.it: Flask Tutorial Part 1

Flask

Install Flask →