Find all triplets with zero sum

def triplets(arr, n):

f = False

for i in range(0, n-2):

for j in range(i+1, n-1):

for k in range(j+1, n):

if (arr[i] + arr[j] + arr[k] == 0):

print(arr[i], arr[j], arr[k])

f = True

if (f == False):

print(" not exist ")

arr = [0, -1, 2, -3, 1]

n = len(arr)

triplets(arr, n)