30-seconds-of-code/snippets/all_unique.md

title, tags

title	tags
all_unique	list,beginner

Returns True if all the values in a flat list are unique, False otherwise.

Use set() on the given list to remove duplicates, compare its length with the length of the list.

def all_unique(lst):
  return len(lst) == len(set(lst))

x = [1,2,3,4,5,6]
y = [1,2,2,3,4,5]
all_unique(x) # True
all_unique(y) # False