Add description

src/phi/async_ldap/model.py

@@ -22,6 +22,10 @@ alog.setLevel(logging.DEBUG)
 
 
 def get_class(obj):
+    """
+    Return the input if input is a class, else tryes to get the class from the
+    `__class__` method.
+    """
     if type(obj) is type:
         return obj
     return obj.__class__