fix: numpy dependency; added error msg for key error

Author: connorferster

pyproject.toml

@@ -7,7 +7,7 @@ authors = [
 ]
 requires-python = ">=3.11"
 dependencies = [
-    "numpy>=2.3.1",
+    "numpy>=2.0.2",
     "plotly>=6.2.0",
     "plotly-3d-primitives>=0.4.0",
     "pydantic>=2.11.7",

src/pynite_tools/envelope.py

@@ -37,6 +37,10 @@ def envelope_tree(tree: dict | list, levels: list[Hashable | None], leaf: Hashab
         # Otherwise, pop the next level and dive into the tree on that branch
         level = levels[0]
         if level is not None:
+            try:
+                tree[level]
+            except KeyError:
+                raise KeyError(f"Key '{level}' does not exist at this level. Available keys: {list(tree.keys())}")
             env_acc.update({level: envelope_tree(tree[level], levels[1:], leaf, agg_func, with_trace)})
             return env_acc
         else: