Rename .py to .pyi.

3/_bisect.pyi

@@ -0,0 +1,18 @@
+"""Stub file for the '_bisect' module."""
+# This is an autogenerated file. It serves as a starting point
+# for a more precise manual annotation of this module.
+# Feel free to edit the source below, but remove this header when you do.
+
+from typing import List, Tuple, Dict, Undefined, GenericType
+
+def bisect(a, x, *args, **kwargs) -> long: ...
+
+def bisect_left(a, x, *args, **kwargs) -> long: ...
+
+def bisect_right(a, x, *args, **kwargs) -> long: ...
+
+def insort(a, x, *args, **kwargs) -> None: ...
+
+def insort_left(a, x, *args, **kwargs) -> None: ...
+
+def insort_right(a, x, *args, **kwargs) -> None: ...