24 lines
626 B
Markdown
24 lines
626 B
Markdown
---
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title: List symmetric difference
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tags: list
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cover: ice
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firstSeen: 2019-08-21T08:37:04+03:00
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lastUpdated: 2020-11-02T19:28:35+02:00
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---
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Returns the symmetric difference between two iterables, without filtering out duplicate values.
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- Create a `set` from each list.
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- Use a list comprehension on each of them to only keep values not contained in the previously created set of the other.
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```py
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def symmetric_difference(a, b):
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(_a, _b) = (set(a), set(b))
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return [item for item in a if item not in _b] + [item for item in b
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if item not in _a]
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```
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```py
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symmetric_difference([1, 2, 3], [1, 2, 4]) # [3, 4]
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```
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