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Module 061: Working with JSON

Phase: 7. Modules, Stdlib & Testing
Duration: 1.5 hours

Learning Objectives

Understand the JSON format and its data type mappings
Serialize Python objects to JSON with json.dumps and json.dump
Deserialize JSON to Python objects with json.loads and json.load
Pretty-print JSON output for readability
Handle non-serializable custom objects using default and cls

Topics Covered

JSON format overview and type mapping
json.dumps() — serialize to string
json.dump() — serialize to file
json.loads() — parse from string
json.load() — parse from file
Pretty-printing with indent and sort_keys
Custom serialization via default callable and JSONEncoder subclass

Prerequisites

Module 060: Milestone Project: Personal Expense Tracker

Next Module

Module 062: Context Managers and the with Statement