prefer List over list

Author: Walnut356

src/etc/lldb_providers.py

@@ -108,7 +108,7 @@ def num_children(self) -> int:
         return 0
 
     def get_child_index(self, name: str) -> int:
-        return None
+        return -1
 
     def get_child_at_index(self, index: int) -> SBValue:
         return None

src/etc/rust_types.py

@@ -1,3 +1,4 @@
+from typing import List
 import re
 
 
@@ -85,12 +86,11 @@ class RustType(object):
 }
 
 
-def is_tuple_fields(fields: list) -> bool:
-    # type: (list) -> bool
+def is_tuple_fields(fields: List) -> bool:
     return all(TUPLE_ITEM_REGEX.match(str(field.name)) for field in fields)
 
 
-def classify_struct(name: str, fields: list) -> str:
+def classify_struct(name: str, fields: List) -> str:
     if len(fields) == 0:
         return RustType.EMPTY
 
@@ -111,7 +111,7 @@ def classify_struct(name: str, fields: list) -> str:
     return RustType.STRUCT
 
 
-def classify_union(fields: list) -> str:
+def classify_union(fields: List) -> str:
     if len(fields) == 0:
         return RustType.EMPTY