Variable substitution syntax in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to display a variable in a Flask template using Jinja2 syntax.

Flask

<p>Hello, {{ [1] }}!</p>

Drag options to blanks, or click blank then click option'

Aname

Bvar

Cinput

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Using Python functions like print inside {{ }}

Forgetting to use double curly braces

Using incorrect variable names

In Flask templates, variables are shown using double curly braces with the variable name inside, like {{ name }}.

2fill in blank

medium

Complete the code to substitute a variable called 'user' in the template.

Flask

<h1>Welcome, {{ [1] }}!</h1>

Drag options to blanks, or click blank then click option'

Auser

Bname

Cusername

Dvisitor

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than passed

Missing the double curly braces

Using single curly braces

The variable user is used inside the double curly braces to show its value in the template.

3fill in blank

hard

Fix the error in the template variable substitution syntax.

Flask

<p>Your score is {{ [1] }}</p>

Drag options to blanks, or click blank then click option'

Ascore;

Bscore()

Cscore:

Dscore

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses like function calls

Adding semicolons or colons

Using incorrect variable names

Variables in Jinja2 templates should be referenced by name only, without parentheses or punctuation.

4fill in blank

hard

Fill both blanks to correctly display a user's first and last name using variable substitution.

Flask

<p>Full name: {{ [1] }} {{ [2] }}</p>

Drag options to blanks, or click blank then click option'

Afirst_name

Blast_name

Cusername

Dfullname

Attempts:

3 left

💡 Hint

Common Mistakes

Using a single variable for full name when separate variables exist

Forgetting to use double curly braces for both variables

Mixing variable names

Use first_name and last_name variables inside {{ }} to show the full name.

5fill in blank

hard

Fill all three blanks to create a dictionary in a Jinja2 template showing item names and their prices if price is greater than 10.

Flask

{% set expensive_items = { [1]: [2] for [3] in items if [2] > 10 } %}

Drag options to blanks, or click blank then click option'

Aitem.name

Bitem.price

Citem

Ditems

Attempts:

3 left

💡 Hint

Common Mistakes

Using the list name as loop variable

Mixing keys and values

Incorrect comparison syntax

Use item.name as key, item.price as value, and loop over item in items.