Add merge_dictionaries

snippets/merge_dictionaries.md

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+---
+title: merge_dictionaries
+tags: dictionary,intermediate
+---
+
+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 }
+```