added s examples.

solid/single_responsability/simple_function.py

@@ -0,0 +1,37 @@
+class User:
+    def __init__(self, name):
+        self.name = name
+        self.isAdmin = False
+
+
+class User2:
+    def __init__(self, name):
+        self.name = name
+        self.is_admin = False
+
+
+class Admin(User2):
+    def __init__(self, name):
+        super().__init__(name)
+        self.is_admin = True
+
+
+users = [
+    User2('walid'),
+    User2('haikel'),
+    User2('manel'),
+    Admin('tristan'),
+    Admin('didier'),
+    User('jonathan'),
+    User('samuel'),
+]
+
+
+def get_user(user_name: str, is_admin: bool = False, consider_old_users: bool=False) -> User | User2 | Admin | None:
+    for user in users:
+        if user_name == user.name:
+            if isinstance(user, User) and not consider_old_users:
+                continue
+            if isinstance(user, User2) and user.is_admin and not is_admin:
+                continue
+            return user