[libgpiod][PATCH 02/22] bindings: python: make internal a private submodule

[Vincent Fazio <vfazio@xxxxxxxxxxx>]

The internal submodule shouldn't be exposed as part of the public
interface, so mark it private following PEP 8 convention [0].

Also, add a type annotation to `sec` for its possible types.

[0]: https://peps.python.org/pep-0008/#public-and-internal-interfaces
Signed-off-by: Vincent Fazio <vfazio@xxxxxxxxxxx>
---
 bindings/python/gpiod/{internal.py => _internal.py} | 1 +
 bindings/python/gpiod/chip.py                       | 2 +-
 bindings/python/gpiod/line_request.py               | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/bindings/python/gpiod/internal.py b/bindings/python/gpiod/_internal.py
similarity index 94%
rename from bindings/python/gpiod/internal.py
rename to bindings/python/gpiod/_internal.py
index d1e95e4ade3146f596643d52207b367e332e6f7e..c9b5d2850389d5314a12bf6d151774a96469a085 100644
--- a/bindings/python/gpiod/internal.py
+++ b/bindings/python/gpiod/_internal.py
@@ -9,6 +9,7 @@ __all__ = ["poll_fd"]
 
 
 def poll_fd(fd: int, timeout: Optional[Union[timedelta, float]] = None) -> bool:
+    sec: Union[float, None]
     if isinstance(timeout, timedelta):
         sec = timeout.total_seconds()
     else:
diff --git a/bindings/python/gpiod/chip.py b/bindings/python/gpiod/chip.py
index 257a31eba8d19634fd14e3b1d33a1345a0363946..1a1bba4d6dd9e840a60394f1b74903f6ad15a0f4 100644
--- a/bindings/python/gpiod/chip.py
+++ b/bindings/python/gpiod/chip.py
@@ -7,10 +7,10 @@ from errno import ENOENT
 from typing import Optional, Union
 
 from . import _ext
+from ._internal import poll_fd
 from .chip_info import ChipInfo
 from .exception import ChipClosedError
 from .info_event import InfoEvent
-from .internal import poll_fd
 from .line import Value
 from .line_info import LineInfo
 from .line_request import LineRequest
diff --git a/bindings/python/gpiod/line_request.py b/bindings/python/gpiod/line_request.py
index e48830450dcb5b7fa6c7983a0fe074cd9bd32ab7..154174872e488fa478b27f5e83d65e6040aca367 100644
--- a/bindings/python/gpiod/line_request.py
+++ b/bindings/python/gpiod/line_request.py
@@ -6,9 +6,9 @@ from datetime import timedelta
 from typing import Optional, Union
 
 from . import _ext
+from ._internal import poll_fd
 from .edge_event import EdgeEvent
 from .exception import RequestReleasedError
-from .internal import poll_fd
 from .line import Value
 from .line_settings import LineSettings, _line_settings_to_ext
 

-- 
2.34.1