{}
# Online Python compiler (interpreter) to run Python online.
# Write Python 3 code in this online editor and run it.
# ===== Set Operations with it_companies =====
it_companies = {'Facebook', 'Google', 'Microsoft', 'Apple', 'IBM', 'Oracle', 'Amazon'}
# 1. Length of the set
print("Length of it_companies:", len(it_companies))
# 2. Add 'Twitter'
it_companies.add('Twitter')
print("After adding 'Twitter':", it_companies)
# 3. Insert multiple IT companies
it_companies.update(['TCS', 'Infosys', 'Wipro'])
print("After adding multiple companies:", it_companies)
# 4. Remove a company (e.g., 'IBM')
it_companies.remove('IBM') # Raises error if 'IBM' not present
print("After removing 'IBM':", it_companies)
# 5. Difference between remove and discard
# remove() throws an error if item doesn't exist
# discard() does not throw an error
it_companies.discard('NonExistentCompany') # No error
print("After discard (safe remove):", it_companies)
# ===== Level 2 Exercises =====
A = {19, 22, 24, 20, 25, 26}
B = {19, 22, 20, 25, 28, 27}
# 1. Join A and B
print("A union B:", A.union(B))
# 2. A intersection B
print("A intersection B:", A.intersection(B))
# 3. Is A subset of B?
print("Is A subset of B?", A.issubset(B))
# 4. Are A and B disjoint?
print("Are A and B disjoint?", A.isdisjoint(B))
# 5. Join A with B and B with A
print("A union B:", A.union(B))
print("B union A:", B.union(A))
# 6. Symmetric difference between A and B
print("Symmetric difference:", A.symmetric_difference(B))
# 7. Delete sets A and B
del A
del B
# ===== Level 3 Exercises =====
# 1. Compare list and set lengths
ages = [22, 19, 24, 25, 26, 24, 25, 24]
ages_set = set(ages)
print("Length of ages list:", len(ages))
print("Length of ages set:", len(ages_set))
if len(ages) > len(ages_set):
print("The list is longer (has duplicates).")
else:
print("The set is longer or equal (unique values).")
# 2. Difference between string, list, tuple, set
print("\n--- Data Type Differences ---")
print("String: Ordered, immutable text. e.g., 'Hello'")
print("List: Ordered, mutable, allows duplicates. e.g., [1, 2, 3]")
print("Tuple: Ordered, immutable, allows duplicates. e.g., (1, 2, 3)")
print("Set: Unordered, mutable, no duplicates. e.g., {1, 2, 3}")
# 3. Count unique words in a sentence
sentence = "I am a teacher and I love to inspire and teach people."
words = sentence.lower().replace(".", "").split()
unique_words = set(words)
print("\nUnique words in sentence:", unique_words)
print("Number of unique words:", len(unique_words))