Make config_loadfile augment cmdline instead of klobbering.

[python_utils.git] / list_utils.py

diff --git a/list_utils.py b/list_utils.py
index 74f1cf3078457d371194deb33ddf5ad6410ed599..7d3355cc85a72a047aacaa0c3f06430a9e8e8dd7 100644 (file)
--- a/list_utils.py
+++ b/list_utils.py
@@ -21,3 +21,9 @@ def flatten(lst: List[Any]) -> List[Any]:
     if isinstance(lst[0], list):
         return flatten(lst[0]) + flatten(lst[1:])
     return lst[:1] + flatten(lst[1:])
+
+
+def prepend(item: Any, lst: List[Any]) -> List[Any]:
+    """Prepend an item to a list."""
+    lst = list.insert(0, item)
+    return lst