PYTHR/deployment/content/unit-6-flask/instructor-resources/hw-10wk-12

Python Programming

Flask: Templates Practice Problems

In this homework, you're going to write code for a few problems.

You will practice these programming concepts we've covered in class:

• Variables
• Routing
• Templates

---

Deliverables

For each of the challenges listed below, you will create a new .py file and write code to solve the problem. For example, you would create problem1.py with your solution code to the first problem. Run the file from the command line to check your work.

Reminder: On your laptop, you can run the file from your command line with the following:

python problem1.py

Hint: After finish writing your code, launch your server, go into your browser, and be sure that your Flask app is outputting the intended data.

Requirements:

• By the end of this, you should have four different .py files (one each for the problems).

---

Problem 1: "Good Artists Copy"

Skill You're Practicing: Using templates to render Python.`

Make an html file like the one from our lesson on templates.

Modify the content of the html file.

Create a Flask app that renders this template. Include a variable that you pass into the template.

Example Test Code

render_template('index.html', name=user)

Example Test Output

"Hi there Akilah. It's great to see you today!"

Hint 1:

Remember: Templates for variables use the double brackets {{}}.

Hint 2:

Our module to use is render_template.

---

Problem 2: "Routing"

Skill You're Practicing: Creating routes with Flask.

Make a copy of one of the three Python files from Problem 1. We're going to modify it.

Create a route whose endpoint is a variable. Pass that variable into your Flask app.

Example Test Code

http://localhost:5000/<food>

Example Test Output

We all know that chicken is not only good, it's good for you.

Hint 1:*

Recall that we need to put an argument into our function that gets wrapped by the @app.route.

---

Problem 3: "All of De Bugs!"

Skill You're Practicing: Turning off debug mode.

In production, we definitely do not want people to see a traceback if our code results in an error.

In app.run, check for debug to be set to True. We don't want that! If debug is False, write a Flask app that prints to the screen "Ain't no bugs on me!"

Example Test Code

def hello():
    return "Ain't no bugs on me!"

Example Test Output

"Ain't no bugs on me!"

Hint 1:

We're looking for an argument within app.run() that sets debug to True. We want to set this argument to False.

Hint 2:

By default, Flask sets this argument to False.

---

Problem 4: "Variables Vary Very for Weary Vikings"

Skill You're Practicing: Passing variables into your Flask app.

Write a Flask app that reads in a variable from another file whose value is your favorite food.

For this problem, you'll have three slightly different versions:

1. The first version will use a variable in your Flask app.
2. The second version will read a variable in from a Python file.
3. The third version will read a variable in from a .txt file.

Example Test Code

favorite_food = Chicken
favorite_dish = BBQ Chicken Pizza

Example Test Output

"My favorite food is chicken on top of my favorite dish, BBQ Chicken Pizza"

Hint 1:

Refer to your class notes from the Variables lesson for how to read in a variable in each approach/style.