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snippets/python/s/invert-dictionary.md

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+---
+title: Invert dictionary
+type: snippet
+language: python
+tags: [dictionary]
+cover: rustic-cup
+dateModified: 2020-11-02T19:28:05+02:00
+---
+
+Inverts a dictionary with unique hashable values.
+
+- Use `dictionary.items()` in combination with a list comprehension to create a new dictionary with the values and keys inverted.
+
+```py
+def invert_dictionary(obj):
+  return { value: key for key, value in obj.items() }
+```
+
+```py
+ages = {
+  'Peter': 10,
+  'Isabel': 11,
+  'Anna': 9,
+}
+invert_dictionary(ages) # { 10: 'Peter', 11: 'Isabel', 9: 'Anna' }
+```