BitWithBite
Python Worksheet
🐍 Dictionaries
SCORE___ / 20
NameClassDate
After this worksheet you can
Create key-value pairsRead and update valuesUse get() safelyLoop over items📚 Quick Recap
🎯 What you'll learn: Python dictionaries — the most important data structure in Python. Key-value pairs, CRUD operations, all dict methods, iteration patterns, nested dicts, and dict comprehensions. Then Python sets — unique unordered collections, set operations (union, intersection, difference), and when to use them.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1d = {'a':1}; d['a'] is:
2Add a pair with:
3d.get('x') when 'x' missing returns:
4Keys must be:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5{'x':5}['x'] = .
6Safe lookup uses d.('key').
7Create a dict mapping 'name' to 'Ali'.
8Update person['name'] to 'Sara'.
9Loop printing key and value of d.
🚀 Section C · Challenge ● CHALLENGE 5
10Why does d['missing'] error but d.get('missing') not?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
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Parent's Signature
✂ answer key — fold or cut before handing out
1-B 2-B 3-C 4-A | 5 5 6 get 7 = person = {'name': 'Ali'} 8 = person['name'] = 'Sara' 9 = for k, v in d.items(): print(k, v) | 10 = [] raises KeyError; get() returns None (or a default)