🧪 Python String Exercises – Practice to Master String Operations
🧲 Introduction – Why Practice String Exercises?
After learning about Python strings—slicing, formatting, escape characters, and methods—the best way to master them is through hands-on practice. String exercises help reinforce your knowledge, improve logic-building skills, and prepare you for interviews, real-world coding tasks, and data challenges.
🎯 In this guide, you’ll practice:
- String slicing and indexing
- String formatting and concatenation
- Using string methods (
split,replace,find,count, etc.) - Real-world challenges like email parsing, text validation, and data cleanup
🔁 Basic String Exercises
✅ 1. Extract Substrings
Question: Given text = "PythonProgramming", extract:
"Python""Programming"
text = "PythonProgramming"
print(text[:6]) # Output: Python
print(text[6:]) # Output: Programming
✅ 2. Reverse a String
s = "hello"
print(s[::-1]) # Output: olleh
✅ 3. Replace Words in a String
sentence = "I love Java"
new_sentence = sentence.replace("Java", "Python")
print(new_sentence) # Output: I love Python
🔠 Intermediate String Challenges
✅ 4. Count Vowels in a String
s = "Python is awesome"
vowels = "aeiouAEIOU"
count = sum(1 for char in s if char in vowels)
print(count) # Output: 6
✅ 5. Check for Palindrome
word = "level"
print(word == word[::-1]) # Output: True
✅ 6. Format Using f-strings
name = "Alice"
age = 28
print(f"My name is {name} and I am {age} years old.")
✅ 7. Get Domain from an Email
email = "user@example.com"
domain = email.split("@")[1]
print(domain) # Output: example.com
🧪 Advanced String Problems
✅ 8. Capitalize Each Word in a Sentence
sentence = "welcome to python"
print(sentence.title()) # Output: Welcome To Python
✅ 9. Count Word Frequency
text = "apple banana apple orange banana apple"
words = text.split()
freq = {word: words.count(word) for word in set(words)}
print(freq)
✅ 10. Validate Password Format
Check if a string:
- Has at least one digit
- Has at least one uppercase letter
- Is at least 8 characters long
password = "Python123"
is_valid = (
any(char.isdigit() for char in password) and
any(char.isupper() for char in password) and
len(password) >= 8
)
print(is_valid) # Output: True
💡 Best Practices
- ✅ Use list comprehensions for quick filtering and counting
- ✅ Practice real-world string manipulations (file paths, emails, logs)
- ✅ Use
.strip(),.split(), and.replace()to clean data - ✅ Try variations: reverse words, filter digits, sanitize input
📌 Summary – Recap & Next Steps
Practicing string exercises is essential for mastering text manipulation in Python. These tasks improve your understanding of string slicing, methods, formatting, and character-level operations.
🔍 Key Takeaways:
- ✅ String exercises cover slicing, formatting, counting, and validation.
- ✅ Practice helps strengthen your foundation and logic-building.
- ✅ Use real-world text inputs to simulate practical tasks.
⚙️ Real-World Relevance:
String handling is used in data cleaning, input validation, log parsing, API response formatting, and interview questions. These exercises prepare you for all of them.
❓ FAQ Section – Python String Exercises
❓ Why should I practice string exercises?
✅ To strengthen your understanding of text manipulation, logic building, and real-world string processing use cases.
❓ What types of tasks can I practice with strings?
✅ You can practice substring extraction, reversing, finding/formatting, word frequency, and data parsing.
❓ Are string exercises useful for interviews?
✅ Yes! String manipulation is one of the most frequently asked topics in Python coding interviews and technical screens.
❓ How can I improve my string manipulation speed?
✅ Use built-in string methods, list comprehensions, and practice regularly with real-world examples.
❓ What’s a good challenge after mastering string exercises?
✅ Try solving file parsing, regular expressions, and web scraping problems where strings and patterns are essential.
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