One-Liners: Short and Powerful Python Code Snippets

Certainly! Here are some short and powerful Python code snippets, often referred to as “one-liners,” that showcase the versatility and elegance of the language:

1. Swap Two Variables:

a, b = b, a

2. Find the Maximum Element in a List:

max_value = max(my_list)

3. List Comprehension – Square of Numbers:

squared_numbers = [x ** 2 for x in numbers]

4. Check for Palindrome:

is_palindrome = word == word[::-1]

5. Count Occurrences of an Element in a List:

count = my_list.count(element)

6. Find the Most Common Element in a List:

most_common = max(my_list, key=my_list.count)

7. Filter Even Numbers using Lambda and Filter:

even_numbers = list(filter(lambda x: x % 2 == 0, numbers))

8. Calculate Factorial using Recursion:

factorial = lambda n: 1 if n == 0 else n * factorial(n - 1)

9. Dictionary Comprehension – Squares as Keys:

squared_dict = {x: x ** 2 for x in range(1, 6)}

10. Flatten a List of Lists:

flattened_list = [item for sublist in nested_list for item in sublist]

11. Sort List of Tuples by Second Element:

sorted_tuples = sorted(list_of_tuples, key=lambda x: x[1])

12. Remove Duplicates from a List:

unique_list = list(set(duplicate_list))

13. Sum of Digits of a Number:

sum_of_digits = sum(int(digit) for digit in str(number))

14. Find Prime Numbers using Sieve of Eratosthenes:

primes = [n for n in range(2, N+1) if all(n % d != 0 for d in range(2, int(n**0.5) + 1))]

15. Transpose a Matrix using Nested List Comprehension:

transposed_matrix = [[row[i] for row in matrix] for i in range(len(matrix[0]))]

These one-liners showcase the power of Python’s concise syntax and built-in functions. While they’re elegant and efficient, keep in mind that readability and maintainability are also essential aspects of writing code. Choose the right approach based on the context and consider breaking complex tasks into more readable code when necessary.