use _typeshed's Path aliases (#4214)

stdlib/2and3/lib2to3/pgen2/__init__.pyi

@@ -1,10 +0,0 @@
-# Stubs for lib2to3.pgen2 (Python 3.6)
-
-import os
-import sys
-from typing import Text, Union
-
-if sys.version_info >= (3, 6):
-    _Path = Union[Text, os.PathLike]
-else:
-    _Path = Text

stdlib/2and3/lib2to3/pgen2/driver.pyi

@@ -1,12 +1,8 @@
-# Stubs for lib2to3.pgen2.driver (Python 3.6)
-
-import os
-import sys
-from typing import Any, Callable, IO, Iterable, List, Optional, Text, Tuple, Union
+from _typeshed import StrPath
+from typing import Any, IO, Iterable, Optional, Text
 
 from logging import Logger
 from lib2to3.pytree import _Convert, _NL
-from lib2to3.pgen2 import _Path
 from lib2to3.pgen2.grammar import Grammar
 
 
@@ -18,7 +14,7 @@ class Driver:
     def parse_tokens(self, tokens: Iterable[Any], debug: bool = ...) -> _NL: ...
     def parse_stream_raw(self, stream: IO[Text], debug: bool = ...) -> _NL: ...
     def parse_stream(self, stream: IO[Text], debug: bool = ...) -> _NL: ...
-    def parse_file(self, filename: _Path, encoding: Optional[Text] = ..., debug: bool = ...) -> _NL: ...
+    def parse_file(self, filename: StrPath, encoding: Optional[Text] = ..., debug: bool = ...) -> _NL: ...
     def parse_string(self, text: Text, debug: bool = ...) -> _NL: ...
 
 def load_grammar(gt: Text = ..., gp: Optional[Text] = ..., save: bool = ..., force: bool = ..., logger: Optional[Logger] = ...) -> Grammar: ...

stdlib/2and3/lib2to3/pgen2/grammar.pyi

@@ -1,8 +1,5 @@
-# Stubs for lib2to3.pgen2.grammar (Python 3.6)
-
-from lib2to3.pgen2 import _Path
-
-from typing import Any, Dict, List, Optional, Text, Tuple, TypeVar
+from _typeshed import StrPath
+from typing import Dict, List, Optional, Text, Tuple, TypeVar
 
 _P = TypeVar('_P')
 _Label = Tuple[int, Optional[Text]]
@@ -20,8 +17,8 @@ class Grammar:
     symbol2label: Dict[Text, int]
     start: int
     def __init__(self) -> None: ...
-    def dump(self, filename: _Path) -> None: ...
-    def load(self, filename: _Path) -> None: ...
+    def dump(self, filename: StrPath) -> None: ...
+    def load(self, filename: StrPath) -> None: ...
     def copy(self: _P) -> _P: ...
     def report(self) -> None: ...
 

stdlib/2and3/lib2to3/pgen2/pgen.pyi

@@ -1,20 +1,19 @@
-# Stubs for lib2to3.pgen2.pgen (Python 3.6)
-
+from _typeshed import StrPath
 from typing import (
     Any, Dict, IO, Iterable, Iterator, List, NoReturn, Optional, Text, Tuple
 )
 
-from lib2to3.pgen2 import _Path, grammar
+from lib2to3.pgen2 import grammar
 from lib2to3.pgen2.tokenize import _TokenInfo
 
 class PgenGrammar(grammar.Grammar): ...
 
 class ParserGenerator:
-    filename: _Path
+    filename: StrPath
     stream: IO[Text]
     generator: Iterator[_TokenInfo]
     first: Dict[Text, Dict[Text, int]]
-    def __init__(self, filename: _Path, stream: Optional[IO[Text]] = ...) -> None: ...
+    def __init__(self, filename: StrPath, stream: Optional[IO[Text]] = ...) -> None: ...
     def make_grammar(self) -> PgenGrammar: ...
     def make_first(self, c: PgenGrammar, name: Text) -> Dict[int, int]: ...
     def make_label(self, c: PgenGrammar, label: Text) -> int: ...
@@ -47,4 +46,4 @@ class DFAState:
     def unifystate(self, old: DFAState, new: DFAState) -> None: ...
     def __eq__(self, other: Any) -> bool: ...
 
-def generate_grammar(filename: _Path = ...) -> PgenGrammar: ...
+def generate_grammar(filename: StrPath = ...) -> PgenGrammar: ...