Arch Linux User Repository

fyi if you get this error

❯ flent-gui
Starting Flent 2.2.0 using Python 3.13.11.
ERROR: Unable to find a usable Qt version, please ensure qtpy is installed (libQt6UiTools.so.6: cannot open shared object file: No such file or directory).

then you likely have the QT_API environment variable set to pyqt6 without having python-qt6 installed. You can just change it to pyqt5. You can also do this if you want to have both pyqt5 and pyqt6 installed.

@awh, Flent does not support Qt6. You'll have to install python-pyqt5 to use the GUI.

❯ flent-gui
Starting Flent 2.2.0 using Python 3.13.7.
Initialised matplotlib v3.10.5 on numpy v2.3.2.
Traceback (most recent call last):
  File "/usr/bin/flent-gui", line 33, in <module>
    sys.exit(load_entry_point('flent==2.2.0', 'gui_scripts', 'flent-gui')())
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/site-packages/flent/__init__.py", line 88, in run_flent_gui
    return run_flent(gui=True)
  File "/usr/lib/python3.13/site-packages/flent/__init__.py", line 57, in run_flent
    return run_gui(settings)
  File "/usr/lib/python3.13/site-packages/flent/gui.py", line 146, in run_gui
    mainwindow = MainWindow(settings)
  File "/usr/lib/python3.13/site-packages/flent/gui.py", line 241, in __init__
    uic.loadUi(get_ui_file("mainwindow.ui"), self)
    ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/load_ui.py", line 86, in loadUi
    return DynamicUILoader(package).loadUi(uifile, baseinstance)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/Loader/loader.py", line 62, in loadUi
    return self.parse(filename)
           ~~~~~~~~~~^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/uiparser.py", line 1014, in parse
    self._handle_widget(ui_file.widget)
    ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/uiparser.py", line 842, in _handle_widget
    self.traverseWidgetTree(el)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/uiparser.py", line 818, in traverseWidgetTree
    handler(self, child)
    ~~~~~~~^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/uiparser.py", line 271, in createWidget
    self.stack.push(self._setupObject(widget_class, parent, elem))
                    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/uiparser.py", line 237, in _setupObject
    self.wprops.setProperties(obj, branch)
    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/properties.py", line 430, in setProperties
    prop_value = self.convert(prop, widget)
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/properties.py", line 393, in convert
    return func(prop[0], **args)
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/properties.py", line 132, in _set
    expr = [self._pyEnumMember(v) for v in prop.text.split('|')]
            ~~~~~~~~~~~~~~~~~~^^^
  File "/usr/lib/python3.13/site-packages/PyQt6/uic/properties.py", line 127, in _pyEnumMember
    scope = getattr(scope, tail)
AttributeError: type object 'QDockWidget' has no attribute 'AllDockWidgetFeatures'. Did you mean: 'NoDockWidgetFeatures'?

Both of those packages are listed as optional dependencies, which is deliberate: it's possible to run tests from the command line without the plotting and GUI capabilities, so they should not be hard dependencies.

just tried to install today, seems to be missing some deps:

# flent-gui

Starting Flent 2.1.1 using Python 3.11.8.
Traceback (most recent call last):
  File "/usr/bin/flent-gui", line 33, in <module>
    sys.exit(load_entry_point('flent==2.1.1', 'gui_scripts', 'flent-gui')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/flent/__init__.py", line 88, in run_flent_gui
    return run_flent(gui=True)
           ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/flent/__init__.py", line 56, in run_flent
    from flent.gui import run_gui
  File "/usr/lib/python3.11/site-packages/flent/gui.py", line 49, in <module>
    import matplotlib
ModuleNotFoundError: No module named 'matplotlib'

after installing python-matplotlib:

# flent-gui

Starting Flent 2.1.1 using Python 3.11.8.
ERROR: Unable to find a usable Qt version No module named 'qtpy'.

after installing python-qtpy, the gui runs.

Ah, that would be because pypi has removed the support for the signature files entirely (and retroactively, thus breaking packaging files that attempt to remove them): https://blog.pypi.org/posts/2023-05-23-removing-pgp/

I'll push an update removing the .asc file from the PKGBUILD, thanks for the report!

Currently fails to build:

==> ERROR: Failure while downloading https://files.pythonhosted.org/packages/source/f/flent/flent-2.1.1.tar.gz.asc Aborting... error: failed to download sources for 'flent-2.1.1-2': error: packages failed to build: flent-2.1.1-2

Maybe pythonhosted.org links changed? https://files.pythonhosted.org/packages/a0/8d/3dc15fbbd37c10486633c09546943aefc8ea8294749732ccf097e8fc0533/flent-2.1.1.tar.gz exists, at least.

Yeah, good point; will fix :)

I wonder if it wouldn't be a good idea to remove python-pyqt5 and python-pyside2 from the optdepends - having all of them listed equally I assumed I'd be good with just one of them, i.e. python-pyqt5 (I wasn't familiar with qtpy), but flent specifically only imports from qtpy and fails if isn't present. The python-qtpy package itself lists python-pyqt5 and python-pyside2 as optdepends again, which I believe should be sufficient overall.

That is standard for PGP-verified sources in AUR. See https://wiki.archlinux.org/index.php/Makepkg#Signature_checking

If the keyserver retrieval doesn't work you should be able to receive the key from wks. Try:

gpg -v --auto-key-locate=clear,wkd,nodefault --locate-key toke@toke.dk