snippets: first commit

snippets/python/flatten.py

@@ -0,0 +1,9 @@
+def flatten(d: dict, leaf_type=str):
+    out = {}
+    for key, value in d.items():
+        if isinstance(value, leaf_type):
+            out[key] = value
+        elif isinstance(value, dict):
+            out = {**out, **flatten(value)}
+        else:
+            raise ValueError("Unexpected value type: {type(value)}")