Redefine _KT and _VT

Author: Max Rozentsveyg

third_party/2and3/boto/utils.pyi

@@ -6,8 +6,6 @@ import time
 
 import boto.connection
 from typing import (
-    _KT,
-    _VT,
     Any,
     Callable,
     Dict,
@@ -18,9 +16,13 @@ from typing import (
     Sequence,
     Tuple,
     Type,
+    TypeVar,
     Union,
 )
 
+_KT = TypeVar('_KT')
+_VT = TypeVar('_VT')
+
 _Provider = Any  # TODO replace this with boto.provider.Provider once stubs exist
 _LockType = Any  # TODO replace this with _thread.LockType once stubs exist
 
@@ -63,7 +65,7 @@ def get_instance_metadata(
     url: str = ...,
     data: str = ...,
     timeout: Optional[int] = ...,
-    num_retries: int = ...
+    num_retries: int = ...,
 ) -> Optional[LazyLoadMetadata]: ...
 def get_instance_identity(
     version: str = ...,
@@ -138,11 +140,13 @@ class AuthSMTPHandler(logging.handlers.SMTPHandler):
     def emit(self, record: logging.LogRecord) -> None: ...
 
 class LRUCache(Dict[_KT, _VT]):
+    __KT = _KT
+    __VT = _VT
     class _Item:
         previous = ...  # type: Optional[LRUCache._Item]
-        key = ...  # type: _KT
-        value = ...  # type: _VT
-        def __init__(self, key: _KT, value: _VT) -> None: ...
+        key = ...  # type: LRUCache.__KT
+        value = ...  # type: LRUCache.__VT
+        def __init__(self, key: LRUCache.__KT, value: LRUCache.__VT) -> None: ...
 
     capacity = ...  # type: int
     head = ...  # type: Optional[LRUCache._Item]