21 lines
408 B
Markdown
21 lines
408 B
Markdown
---
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title: has_duplicates
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tags: list,beginner
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---
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Returns `True` if there are duplicate values in a flat list, `False` otherwise.
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Use `set()` on the given list to remove duplicates, compare its length with the length of the list.
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```py
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def has_duplicates(lst):
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return len(lst) != len(set(lst))
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```
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```py
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x = [1, 2, 3, 4, 5, 5]
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y = [1, 2, 3, 4, 5]
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has_duplicates(x) # True
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has_duplicates(y) # False
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```
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