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all_unique python Code Snippet in 2022

listbeginner

Last Updated: 26 November 2022

Checks if all the values in a list are unique.

  • Use set() on the given list to keep only unique occurrences.
  • Use len() to compare the length of the unique values to the original 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

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