Set Exercises
Beginner Exercises
- Create a set from a list with duplicates to show automatic deduplication
- Check if two sets share any elements using intersection
- Find the difference between two sets
- Combine two sets into a union without duplicates
- Check if one set is a subset of another
Example
# Remove duplicates from a list using a set
numbers = [1, 2, 2, 3, 4, 4, 5]
unique_numbers = set(numbers)
print(unique_numbers)Output
{1, 2, 3, 4, 5}Intermediate Challenges
| Problem | Input Example | Expected Output |
|---|---|---|
| Find common elements | {1, 2, 3}, {2, 3, 4} | {2, 3} |
| Find unique elements | {1, 2, 3}, {2, 3, 4} | {1, 4} |
| Check subset | {1, 2}, {1, 2, 3, 4} | True |
| Remove multiple items | {1, 2, 3, 4, 5}, [2, 4] | {1, 3, 5} |
| Perform set operations | {1, 2, 3}, {3, 4, 5} | Union: {1, 2, 3, 4, 5}, Intersection: {3} |
Advanced Problems
Work with multiple sets to solve more complex problems, such as finding elements that occur in only one of the sets.
Example
# Find elements that appear in only one of three sets
def unique_elements(*sets):
all_elements = set()
seen_multiple = set()
for s in sets:
for element in s:
if element in all_elements:
seen_multiple.add(element)
all_elements.add(element)
return all_elements - seen_multiple
set1 = {1, 2, 3}
set2 = {2, 3, 4}
set3 = {3, 4, 5}
print(unique_elements(set1, set2, set3)) # {1, 5}Output
{1, 5}