Working with JSON files in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What Python module is used to work with JSON files?

The json module is used to read from and write to JSON files in Python.

beginner

How do you read JSON data from a file in Python?

Use json.load(file_object) after opening the file in read mode.

beginner

How do you write Python data to a JSON file?

Use json.dump(data, file_object) after opening the file in write mode.

intermediate

What is the difference between json.load() and json.loads()?

json.load() reads JSON data from a file object, while json.loads() reads JSON data from a string.

beginner

Why is it important to open JSON files with the correct mode?

Opening a file in the wrong mode (e.g., reading in write mode) causes errors. Use 'r' for reading and 'w' for writing to handle JSON files properly.

Which function reads JSON data from a file in Python?

A json.dumps()

B json.loads()

C json.dump()

D json.load()

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

Which mode should you use to open a JSON file for writing?

A 'w'

B 'r'

C 'a'

D 'x'

Use 'w' mode to write to a file, which overwrites existing content.

What does json.dumps() do?

A Converts Python data to a JSON string

B Reads JSON from a file

C Writes JSON to a file

D Parses JSON string to Python data

json.dumps() converts Python objects into JSON formatted strings.

If you have a JSON string, which function converts it to Python data?

A json.load()

B json.dumps()

C json.loads()

D json.dump()

json.loads() parses a JSON string into Python data.

What happens if you try to read a JSON file opened in write mode?

A It reads the file successfully

B It raises an error

C It creates a new file

D It appends data

Opening a file in write mode and trying to read causes an error because the file is not readable in that mode.

Explain the steps to read JSON data from a file in Python.

Think about how you open files and use the json module.

Describe how to save Python data as JSON in a file.

Remember to convert Python data to JSON format and write it.