Context Managers & JSON Data
Read/write files safely with open() and serialize complex Python dicts to JSON.
Learning objectives
- Use with open() context manager to ensure proper file closing
- Parse and generate JSON using json.loads() and json.dumps()
Lesson material
Working with JSON
JSON (JavaScript Object Notation) is standard for web data exchange.
Example code
import json
data = {"title": "PyMastery", "version": 1.0, "active": True}
json_str = json.dumps(data)
print("Serialized JSON:", json_str)
parsed = json.loads(json_str)
print("Parsed Title:", parsed["title"])Practice exercise: JSON Processing
Import json. Given json string `s = '{"score": 95}'`, parse it to dict and print the value of `"score"`.
Test yourself with the Module 9: File Handling & Serialization quiz →