We can even easily write it as a one-line without lambda: [{ 1: n, 6: "Fizz", 10: "Buzz", 0: "FizzBuzz" }[n**4%15] for n in range(1, 101)] The lambda in t

We can even easily write it as a one-line without lambda: [{ 1: n, 6: "Fizz", 10: "Buzz", 0: "FizzBuzz" }[n**4%15] for n in range(1, 101)] The lambda in the original code is just used to convert the 0..99 that's generated by range(100) to 1..100. Using range(1, 101) instead generates the appropriate range of numbers from the beginning.