10 Python One-Liners That Will Blow Your Mind

Python is famous for its readability, but sometimes the most mind-blowing thing is how much you can do in just one line of code. Here are 10 Python one-liners that will amaze you.

1. Reverse a string

print("hello world"[::-1])

2. Swap two variables without a temp variable

a, b = 5, 10; a, b = b, a

3. Check if a string is a palindrome

print(s == s[::-1])

4. Find the factorial of a number

import math; print(math.factorial(5))

5. Get unique elements from a list

print(list(set([1,2,2,3,4,4,5])))

6. Flatten a list of lists

print([x for row in [[1,2],[3,4],[5]] for x in row])

7. Generate a Fibonacci sequence (first 10 numbers)

fib = lambda n: n if n<2 else fib(n-1)+fib(n-2); print([fib(i) for i in range(10)])

8. Transpose a matrix

print(list(zip(*[[1,2,3],[4,5,6],[7,8,9]])))

9. Find the most frequent element in a list

print(max(set([1,2,2,3,3,3,4]), key=[1,2,2,3,3,3,4].count))

10. One-line list comprehension for squares

print([x**2 for x in range(10)])