From 2e504b7b00f40b33cd583d5c246cda751fcdd8a0 Mon Sep 17 00:00:00 2001
From: InsanePrawn <insane.prawny@gmail.com>
Date: Mon, 11 Dec 2023 12:49:28 +0100
Subject: [PATCH] dictscheme: fix type hinting

---
 dictscheme.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/dictscheme.py b/dictscheme.py
index c5537d3..ca7c12c 100644
--- a/dictscheme.py
+++ b/dictscheme.py
@@ -52,7 +52,7 @@ class DictScheme(Munch):
     _sparse: ClassVar[bool] = False
 
     def __init__(self, d: Mapping = {}, validate: bool = True, **kwargs):
-        self.update(d | kwargs, validate=validate)
+        self.update(dict(d) | kwargs, validate=validate)
 
     @classmethod
     def transform(
@@ -269,10 +269,13 @@ class DictScheme(Munch):
     ) -> str:
         import yaml
         yaml_args = {'sort_keys': False} | yaml_args
-        return yaml.dump(
+        dumped = yaml.dump(
             self.toDict(strip_hidden=strip_hidden, sparse=sparse),
             **yaml_args,
         )
+        if dumped is None:
+            raise Exception(f"Failed to yaml-serialse {self}")
+        return dumped
 
     def toToml(
             self,