Working with JSON files in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a JSON file named 'data.json' for reading.

Python

with open('data.json', [1]) as file:
    data = file.read()

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

A'w'

B'r'

C'a'

D'x'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' instead of 'r' will overwrite the file.

Using 'a' opens the file for appending, not reading.

To read a file, you use mode 'r'.

2fill in blank

medium

Complete the code to load JSON data from a file object named 'file'.

Python

import json

data = json.[1](file)

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

Aload

Bdump

Cloads

Ddumps

Attempts:

3 left

💡 Hint

Common Mistakes

Using dump or dumps which are for writing JSON.

Using loads which expects a string, not a file.

The function json.load() reads JSON data from a file object.

3fill in blank

hard

Fix the error in the code to write a Python dictionary 'data' to a JSON file named 'output.json'.

Python

import json

with open('output.json', 'w') as file:
    json.[1](data, file)

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

Adump

Bloads

Cload

Ddumps

Attempts:

3 left

💡 Hint

Common Mistakes

Using load or loads which are for reading JSON.

Using dumps without writing the string to the file.

Use json.dump() to write JSON data to a file.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps each word to its length, but only for words longer than 3 characters.

Python

words = ['apple', 'bat', 'carrot', 'dog']
lengths = {word: [1] for word in words if [2]

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Alen(word)

Bword

Clen(word) > 3

Dword > 3

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself as the value instead of its length.

Comparing the word string directly to 3, which is invalid.

The dictionary maps each word to its length using len(word). The condition filters words with length greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that converts keys to uppercase, keeps values, and filters only items where value is greater than 10.

Python

data = {'a': 5, 'b': 15, 'c': 20}
result = { [1]: [2] for k, v in data.items() if [3] }

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

Ak.upper()

Bv

Cv > 10

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using the original key without converting to uppercase.

Filtering with incorrect conditions like k > 10.

The comprehension creates a new dictionary with uppercase keys, original values, and includes only items where the value is greater than 10.