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30-seconds-of-code/snippets/merge_dictionaries.md
2022-03-22 12:32:56 +02:00

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---
title: Merge dictionaries
tags: dictionary
expertise: intermediate
author: maciv
firstSeen: 2020-04-16T19:28:35+03:00
lastUpdated: 2020-11-02T19:28:27+02:00
---
Merges two or more dictionaries.
- Create a new `dict` and loop over `dicts`, using `dictionary.update()` to add the key-value pairs from each one to the result.
```py
def merge_dictionaries(*dicts):
res = dict()
for d in dicts:
res.update(d)
return res
```
```py
ages_one = {
'Peter': 10,
'Isabel': 11,
}
ages_two = {
'Anna': 9
}
merge_dictionaries(ages_one, ages_two)
# { 'Peter': 10, 'Isabel': 11, 'Anna': 9 }
```