Did you use emerge to install all the packages ?

Did you also consider using a virtual environment ?

@Moldy01 said in QtSerialPort write() problems:

For some reason inside of the bowels of Qt, serial.Serial doesn't exist

Don't know what this means, don't know what serial.Serial might be.

Your code does not seem to use anything Qt, no QSerialPort class. Don't know what self.openPort() might or might not do. Don't know what self.port is.

The only Qt code here is the setText(), which won't work anyway in the sense that it won't appear because you don't allow the Qt event loop to run.

All your code seems maybe to use Python serial port handling/code, so look there for answers.

Hi and welcome to devnet,

You need to try a different mirror.

See this thread.

@lokeshdotp said in Segmentation fault after migrating to PySide2 from PyQT5:

#0 0x00000000021b3f90 in ?? ()
#1 0x00007fffe8bb7986 in Shiboken::BindingManager::runDeletionInMainThread() () from /PathToBin/venv/lib/python3.6/site-packages/shiboken2/libshiboken2.abi3.so.5.15

Shiboken::BindingManager::runDeletionInMainThread():

void BindingManager::runDeletionInMainThread() { for (const DestructorEntry &e : m_d->deleteInMainThread) e.destructor(e.cppInstance); m_d->deleteInMainThread.clear(); }

Of the options for a functional call, my guess is that e.destructor() is stack frame #0. Presuming the naming is accurate, I suspect a double deletion. Python and Qt object lifetime management sometimes collide unless extra precautions are taken. https://www.riverbankcomputing.com/static/Docs/PyQt5/gotchas.html#garbage-collection discusses the topic at a high level. Perhaps PySide has slightly different object lifetime tracking.

Connecting a debug print statement to QObject::destroyed() has helped me diagnose similar situations with PyQt programs.

@britesc
Quite understand. Maybe there are some youtube videos or spoken books which would allow to learn with overstressing sight.

Read up on classes and instances, you will need a thorough understanding for Python/OOP no matter what you do. Remember usage works like:

class SomeClass(optionalClassItDerivesFrom): # class definition def __init__(self, optionalAnyParameters): # class constructor, called first whenever an instance is created ... # outside world classInstanceVariable = SomeClass() # create an instance of the class

A class is like Animal or Lion --- it defines attributes and behaviours for animals/lions, but it does not create any animal or lion. lion1 = Lion() creates an instance of a Lion(), i.e. some individual lion with Lion attributes.

@demberto
No need for else: IMHO :) Now you hide if the base class setData() were to fail. To me

return super().set_data(index, value, role)

as the final line makes sense.

Thanks for the help everybody! I will look into the commercial side.

@manuelo It's a now know issue, see PYSIDE-2255.

@kgenbio you misunderstood me, QPixmap is mandatory for QLabel. What I wrote is that recreating it every time was not the most performance friendly way to handle it.

It is not possible attach files, so here the code (from an external hosting):
https://mega.nz/file/FDIThArB#wf8nzrveUSlaj76gx_Qmtu7yv_1K4Ivj_BRfkdIB6mw

I hope it helps!
AGA

@friedemannkleint I am using window 11

Issue solved by implementing the checkboxes through Qt.ItemIsUserCheckable, rather than through a delegate

@ALI
What is the point of you asking this question in another post, I answered it there, now you ask here... ? This is why double-posting is unhelpful.

@ALI
The code you show has a MatplotlibWidget derived from QMainWindow but no indication it defines a variable named MplWidget inside that, as you can see by searching the code you posted. Hence the error message.

The issue seems to be solved when i switched to Qt Creator 10.0.0-beta2.

Hi and welcome to devnet,

Might be a silly question but did you check that the URL built is correct ?

@Chris-Kawa said in QPushButton clicked connect strange behavior:

This actually calls the newNote() function

Yes, because you called it (used the () operator). You're supposed to pass the function address, not call it i.e.

newNoteButton.clicked.connect(self.newNote)

Right, it works now. Thanks a bunch.