Lesson 10 · Dictionaries · Part 1 — Level I · Guide

July 23, 2026 · Bridge Academy Python Program

Learning goals

• Build dictionaries with curly braces: {"key": "value"}.
• Create an empty dictionary with {}.
• Look up a value by its key: d["key"].
• Add a new key or update an existing one: d["new"] = value.
• Remove a key with del d["key"].
• Check whether a key is in a dictionary with in / not in.
• Count keys with len(d).

This lesson covers PCEP-30-02 objective 3.3.