Accessing query parameters in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the value of the 'name' query parameter in a Flask route.

Flask

from flask import Flask, request
app = Flask(__name__)

@app.route('/hello')
def hello():
    name = request.args.get([1])
    return f"Hello, {name}!"

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

A'query'

B'user'

C'id'

D'name'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong key string inside get(), like 'user' or 'id'.

Forgetting to use quotes around the key.

The query parameter key is 'name', so request.args.get('name') retrieves its value.

2fill in blank

medium

Complete the code to provide a default value 'Guest' if the 'name' query parameter is missing.

Flask

from flask import Flask, request
app = Flask(__name__)

@app.route('/welcome')
def welcome():
    name = request.args.get('name', [1])
    return f"Welcome, {name}!"

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

ANone

B''

C'Guest'

D'User'

Attempts:

3 left

💡 Hint

Common Mistakes

Using None which returns None instead of a string.

Forgetting quotes around the default string.

The second argument to get() is the default value returned if the parameter is missing. 'Guest' is the desired default.

3fill in blank

hard

Fix the error in the code to correctly access the 'age' query parameter as an integer.

Flask

from flask import Flask, request
app = Flask(__name__)

@app.route('/age')
def age():
    age = int(request.args.get([1], 0))
    return f"Age is {age}"

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

A'age'

Bage

C'Age'

D'AGE'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without quotes.

Using wrong case like 'Age' or 'AGE'.

The key must be the exact string 'age' matching the query parameter name. Using a variable or wrong case causes errors.

4fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps each query parameter key to its value.

Flask

from flask import Flask, request
app = Flask(__name__)

@app.route('/params')
def params():
    params_dict = { [1]: [2] for [3] in request.args }
    return str(params_dict)

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

Akey

Bvalue

Crequest.args[key]

Dfor

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'value' as loop variable instead of 'key'.

Forgetting to use request.args[key] to get the value.

In a dictionary comprehension, the syntax is {key: value for key in iterable}. Here, key is 'key', value is request.args[key], and the loop variable is 'key'.

5fill in blank

hard

Fill all three blanks to filter query parameters with values longer than 3 characters into a new dictionary.

Flask

from flask import Flask, request
app = Flask(__name__)

@app.route('/filter')
def filter_params():
    filtered = { [1]: [2] for [3] in request.args if len(request.args[[3]]) > 3 }
    return str(filtered)

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

Akey

Brequest.args[key]

Cvalue

Drequest.args

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'value' as loop variable but not defining it.

Not accessing the value correctly with request.args[key].

The dictionary comprehension uses 'key' as the loop variable, maps key to request.args[key], and filters by length of the value.