19 lines
371 B
Markdown
19 lines
371 B
Markdown
---
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title: difference
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tags: list,beginner
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---
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Returns the difference between two iterables.
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Create a `set` fromn `b`, then use list comprehension on `a` to only keep values not contained in the previously created set, `_b`.
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```py
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def difference(a, b):
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_b = set(b)
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return [item for item in a if item not in _b]
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```
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```py
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difference([1, 2, 3], [1, 2, 4]) # [3]
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```
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