[libgpiod][PATCH 11/22] bindings: python: cast return value of LineRequest.get_values

[Vincent Fazio <vfazio@xxxxxxxxxxx>]

The `values` argument of `_ext.Request.get_values` uses a preallocated
`list[None]` as a buffer that is populated with `Value`s by the external
module that are then returned from the function.

Use `cast` to inform the type checker it's a `list[Value]` despite how
it's allocated.

Also, as `lines` is typed as an `Iterable`, there is no guarantee it has
a `__len__` method. Instead, use the size of the `offsets` array to
allocate the buffer.

Signed-off-by: Vincent Fazio <vfazio@xxxxxxxxxxx>
---
 bindings/python/gpiod/line_request.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bindings/python/gpiod/line_request.py b/bindings/python/gpiod/line_request.py
index a1ca64cfd82c32be5de3fc53f6c981026911bb9c..917020b9ec7046dd8e10158f70efb555fc87eade 100644
--- a/bindings/python/gpiod/line_request.py
+++ b/bindings/python/gpiod/line_request.py
@@ -122,7 +122,7 @@ class LineRequest:
 
         offsets = [self._line_to_offset(line) for line in lines]
 
-        buf = [None] * len(lines)
+        buf = cast(list[Value], [None] * len(offsets))
 
         self._req.get_values(offsets, buf)
         return buf

-- 
2.34.1