[Slackbuilds-users] meld3 fails to start

[Andrzej Telszewski]

On 11/05/2025 17:39, fourtysixandtwo wrote:
> Hi Andrzej,
>
> See it here too.  I would report upstream.  meld3 claims to support
> python >=3.6 in pyproject.toml.
>
> Here's a patch for the source to make it work on python-3.9.  I did
> this once before on something I never submitted to SBo and meld3 was
> much easier to fix.

Worked for me as well, thanks!

>
> diff --git a/meld/actiongutter.py b/meld/actiongutter.py
> index 6830d93..8c4ba92 100644
> --- a/meld/actiongutter.py
> +++ b/meld/actiongutter.py
> @@ -215,8 +215,8 @@ class ActionGutter(Gtk.DrawingArea):
>      def motion_event(
>          self,
>          controller: Gtk.EventControllerMotion,
> -        x: float | None = None,
> +        x: "float | None" = None,
> -        y: float | None = None,
> +        y: "float | None" = None,
>      ):
>          if x is None or y is None:
>              # Missing coordinates are leave events
> diff --git a/meld/chunkmap.py b/meld/chunkmap.py
> index 7db280e..994b924 100644
> --- a/meld/chunkmap.py
> +++ b/meld/chunkmap.py
> @@ -258,8 +258,8 @@ class ChunkMap(Gtk.DrawingArea):
>      def motion_event(
>          self,
>          controller: Gtk.EventControllerMotion,
> -        x: float | None = None,
> +        x: "float | None" = None,
> -        y: float | None = None,
> +        y: "float | None" = None,
>      ):
>          if self._have_grab:
>              self._scroll_fraction(y, animate=False)
>
>
> On Sun, May 11, 2025 at 5:22 AM Andrzej Telszewski
> <andrzej at telszewski.com> wrote:
>> Hello,
>>
>> after latest update, meld3 fails for me with:
>>
>>       x: float | None = None,
>> TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'
>>
>> I guess this is because of unsupported syntax in stock Slackware Python
>> which is 3.9:
>>
>> https://stackoverflow.com/questions/76712720/typeerror-unsupported-operand-types-for-type-and-nonetype
>>
>> Per the link above, we would need at least Python 3.10 or maybe try to
>> patch meld3.
>>
>> Anyone experiencing this issue?
>>
>> --
>> Best regards,
>> Andrzej Telszewski
>>
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