Add files

Signed-off-by: András Schmelczer <andras@schmelczer.dev>

good_ai/src/sus/unique.py

@@ -0,0 +1,16 @@
+from typing import Any, Callable, Iterable, List
+
+
+def unique(
+    values: Iterable[Any], *, key: Callable[[Any], Any] = lambda v: v
+) -> List[Any]:
+    """Only keep first occurrences and maintian order"""
+
+    key_values = {}
+    for v in values:
+        k = key(v)
+        if k not in key_values:
+            # dicts maintin insertion order: https://mail.python.org/pipermail/python-dev/2017-December/151283.html
+            key_values[k] = v
+
+    return list(key_values.values())