Python Coding Practice Problems

Python Coding Practice Problems

Consistent practice with Python coding problems is a great way to sharpen your programming skills, prepare for interviews, and deepen your understanding of various Python concepts. At CodingTag, we provide a wide variety of problems organized by topic, ensuring a comprehensive learning journey.

Why Practice Python Problems?

Solving Python problems enhances your ability to write clean, efficient code, helps you learn problem-solving techniques, and improves your debugging skills. It also prepares you to handle real-world programming challenges.

Python Practice Problems with Answers

1. Find the factorial of a given number.
   

   def factorial(n):
       result = 1
       for i in range(2, n+1):
           result *= i
       return result
   
   print(factorial(5))  # Output: 120
   

2. Check if a string is a palindrome.
   

   def is_palindrome(s):
       return s == s[::-1]
   
   print(is_palindrome("madam"))  # Output: True
   print(is_palindrome("hello"))  # Output: False
   

3. Generate Fibonacci series up to n terms.
   

   def fibonacci(n):
       fib_series = [0, 1]
       for i in range(2, n):
           fib_series.append(fib_series[-1] + fib_series[-2])
       return fib_series[:n]
   
   print(fibonacci(7))  # Output: [0, 1, 1, 2, 3, 5, 8]
   

4. Find the maximum and minimum elements in a list.
   

   def find_max_min(lst):
       return max(lst), min(lst)
   
   print(find_max_min([3, 9, 1, 7]))  # Output: (9, 1)
   

5. Count the number of vowels in a string.
   

   def count_vowels(s):
       vowels = "aeiouAEIOU"
       return sum(1 for char in s if char in vowels)
   
   print(count_vowels("Hello World"))  # Output: 3
   

6. Reverse a list without using built-in reverse functions.
   

   def reverse_list(lst):
       reversed_lst = []
       for i in range(len(lst)-1, -1, -1):
           reversed_lst.append(lst[i])
       return reversed_lst
   
   print(reverse_list([1, 2, 3, 4]))  # Output: [4, 3, 2, 1]
   

7. Merge two dictionaries into one.
   

   def merge_dicts(d1, d2):
       merged = d1.copy()
       merged.update(d2)
       return merged
   
   print(merge_dicts({'a': 1, 'b': 2}, {'c': 3, 'd': 4}))  
   # Output: {'a': 1, 'b': 2, 'c': 3, 'd': 4}
   

8. Check if a number is prime.
   

   def is_prime(num):
       if num <= 1:
           return False
       for i in range(2, int(num ** 0.5) + 1):
           if num % i == 0:
               return False
       return True
   
   print(is_prime(17))  # Output: True
   print(is_prime(20))  # Output: False
   

9. Sort a list of tuples based on the second element.
   

   def sort_tuples(tuples_list):
       return sorted(tuples_list, key=lambda x: x[1])
   
   print(sort_tuples([(1, 3), (4, 1), (2, 2)]))  
   # Output: [(4, 1), (2, 2), (1, 3)]
   

10. Read a text file and count the frequency of each word.
    

    def word_frequency(filename):
        freq = {}
        with open(filename, 'r') as file:
            for line in file:
                words = line.strip().split()
                for word in words:
                    freq[word] = freq.get(word, 0) + 1
        return freq
    
    # Example usage: create a file 'sample.txt' with some text to test
    # print(word_frequency('sample.txt'))