Python Exercises

Start with the 50 practice problems

Classic problems from FizzBuzz to an LRU cache, in order of difficulty. Also on one page.

1. FizzBuzz
2. Reverse the Words
3. Count the Vowels
4. Palindrome Check
5. Sum of Digits
6. Largest Number Without max()
7. Remove Duplicates, Keep the Order
8. Second Largest Value
9. Most Common Character
10. Are They Anagrams?
11. Factorial, With a Proper Error
12. Is It Prime?
13. Letter Grade
14. Title Case Without .title()
15. Common Elements
16. Flatten a List of Lists
17. Merge Two Inventories
18. Invert a Dictionary
19. Password Strength Check
20. Average of Messy Input
21. Fibonacci Generator
22. Sieve of Eratosthenes
23. Caesar Cipher
24. Top Words in a Text
25. Group the Anagrams
26. Balanced Brackets
27. Run-Length Encoding
28. Binary Search
29. Merge Two Sorted Lists
30. Rotate a List
31. Deep Flatten
32. Roman Numerals
33. Longest Common Prefix
34. Parse a Log Line With Regex
35. A Bank Account Class
36. Two Sum
37. Longest Substring Without Repeats
38. Merge Overlapping Intervals
39. Top K Frequent Elements
40. Maximum Subarray (Kadane)
41. Coin Change (Dynamic Programming)
42. Longest Increasing Subsequence
43. Shortest Path in a Graph (BFS)
44. LRU Cache
45. Trie for Autocomplete
46. Write a Memoize Decorator
47. A Retry Decorator With Arguments
48. A Context Manager That Cleans Up
49. Revenue by Region With pandas
50. Leaderboard With a Dataclass

Python Fundamentals

Control Flow

Data Structures