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snippets/python/s/similarity.md

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+---
+title: List similarity
+type: snippet
+language: python
+tags: [list]
+cover: sunflowers
+dateModified: 2020-11-02T19:28:35+02:00
+---
+
+Returns a list of elements that exist in both lists.
+
+- Use a list comprehension on `a` to only keep values contained in both lists.
+
+```py
+def similarity(a, b):
+  return [item for item in a if item in b]
+```
+
+```py
+similarity([1, 2, 3], [1, 2, 4]) # [1, 2]
+```