23 lines
459 B
Markdown
23 lines
459 B
Markdown
---
|
|
title: has_duplicates
|
|
tags: list,beginner
|
|
firstSeen: 2018-04-01T11:03:09+03:00
|
|
lastUpdated: 2020-11-02T19:28:05+02:00
|
|
---
|
|
|
|
Checks if there are duplicate values in a flat list.
|
|
|
|
- Use `set()` on the given list to remove duplicates, compare its length with the length of the list.
|
|
|
|
```py
|
|
def has_duplicates(lst):
|
|
return len(lst) != len(set(lst))
|
|
```
|
|
|
|
```py
|
|
x = [1, 2, 3, 4, 5, 5]
|
|
y = [1, 2, 3, 4, 5]
|
|
has_duplicates(x) # True
|
|
has_duplicates(y) # False
|
|
```
|