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1. Print First Word2. Print Last Word3. Reverse Order of Words4. Find Longest Word5. Find Shortest Word6. Capitalize First Letter of Each Word7. Swap First and Last Word8. Count Words Starting with Vowel9. Remove Duplicate Words10. Sort Words Alphabetically

Remove Duplicate Words

Remove duplicate words from string.

IntermediatePhase 5 - Category 3: Word OperationsExample 9 of 10
remove-duplicate-words.py
1# Take string input
2s = input("Enter a string: ")
3

4# Remove duplicate words
5words = s.split()
6unique_words = []
7seen = set()
8for word in words:
9    if word not in seen:
10        unique_words.append(word)
11        seen.add(word)
12

13result = " ".join(unique_words)
14print(f"Without duplicates: {result}")

Output

Enter a string: hello world hello programming
Without duplicates: hello world programming

What's going on

Keep only first occurrence of each word.

Key Concepts:

Use set to track seen words
Add to result if not seen
Preserves order

🔗Related Content

PreviousCount Words Starting with VowelNextSort Words Alphabetically