fix: allow path to be a list of strings as well as integers

voluptuous/error.py

@@ -19,7 +19,13 @@ class Invalid(Error):
 
     """
 
-    def __init__(self, message: str, path: typing.Optional[typing.List[str]] = None, error_message: typing.Optional[str] = None, error_type: typing.Optional[str] = None) -> None:
+    def __init__(
+        self,
+        message: str,
+        path: typing.Optional[typing.List[typing.Union[str, int]]] = None,
+        error_message: typing.Optional[str] = None,
+        error_type: typing.Optional[str] = None
+    ) -> None:
         Error.__init__(self, message)
         self._path = path or []
         self._error_message = error_message or message
@@ -30,7 +36,7 @@ def msg(self) -> str:
         return self.args[0]
 
     @property
-    def path(self) -> typing.List[str]:
+    def path(self) -> typing.List[typing.Union[str, int]]:
         return self._path
 
     @property
@@ -45,7 +51,7 @@ def __str__(self) -> str:
             output += ' for ' + self.error_type
         return output + path
 
-    def prepend(self, path: typing.List[str]) -> None:
+    def prepend(self, path: typing.List[typing.Union[str, int]]) -> None:
         self._path = path + self.path
 
 
@@ -61,7 +67,7 @@ def msg(self) -> str:
         return self.errors[0].msg
 
     @property
-    def path(self) -> typing.List[str]:
+    def path(self) -> typing.List[typing.Union[str, int]]:
         return self.errors[0].path
 
     @property
@@ -74,7 +80,7 @@ def add(self, error: Invalid) -> None:
     def __str__(self) -> str:
         return str(self.errors[0])
 
-    def prepend(self, path: typing.List[str]) -> None:
+    def prepend(self, path: typing.List[typing.Union[str, int]]) -> None:
         for error in self.errors:
             error.prepend(path)
 

voluptuous/humanize.py

@@ -7,10 +7,7 @@
 MAX_VALIDATION_ERROR_ITEM_LENGTH = 500
 
 
-IndexT = typing.TypeVar("IndexT")
-
-
-def _nested_getitem(data: typing.Dict[IndexT, typing.Any], path: typing.List[IndexT]) -> typing.Optional[typing.Any]:
+def _nested_getitem(data: typing.Any, path: typing.List[typing.Union[str, int]]) -> typing.Optional[typing.Any]:
     for item_index in path:
         try:
             data = data[item_index]

voluptuous/validators.py

@@ -224,7 +224,7 @@ def __voluptuous_compile__(self, schema: Schema) -> typing.Callable:
         schema.required = old_required
         return self._run
 
-    def _run(self, path: typing.List[str], value):
+    def _run(self, path: typing.List[typing.Union[str, int]], value):
         if self.discriminant is not None:
             self._compiled = [
                 self.schema._compile(v)
@@ -243,7 +243,7 @@ def __repr__(self):
             self.msg
         )
 
-    def _exec(self, funcs: typing.Iterable, v, path: typing.Optional[typing.List[str]] = None):
+    def _exec(self, funcs: typing.Iterable, v, path: typing.Optional[typing.List[typing.Union[str, int]]] = None):
         raise NotImplementedError()