[Slackbuilds-users] meld3 fails to start

[fourtysixandtwo]

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.

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
>
> _______________________________________________
> SlackBuilds-users mailing list
> SlackBuilds-users at slackbuilds.org
> https://lists.slackbuilds.org/mailman/listinfo/slackbuilds-users
> Archives - https://lists.slackbuilds.org/pipermail/slackbuilds-users/
> FAQ - https://slackbuilds.org/faq/
>