Questions tagged [pyqt5]
Qt 5 bindings for Python programming. This allows programmer to make Qt 5 graphical user interfaces using Python syntax.
pyqt5
14,812
questions
70
votes
14
answers
72k
views
AttributeError: module 'sipbuild.api' has no attribute 'prepare_metadata_for_build_wheel' for PyQt5 5.15.0
A program I am trying to install requires the installation of PyQt5 5.15.0 , which gives me this error. The odd thing is that the installation works fine for the latest version of PyQt5 (5.15.2), but ...
- 701
67
votes
3
answers
60k
views
Is there a tutorial specifically for PyQt5? [closed]
I am looking for a PyQt5 tutorial. It is rather complicated to start GUI development with Python for the first time without a tutorial.
I only found some PyQt4 tutorials so far, and since something ...
- 1,906
65
votes
6
answers
145k
views
Python 3.7.0 No module named 'PyQt5.QtWebEngineWidgets'
I have Python 3.7.0 and I installed PyQt5 with this command:
pip install PyQt5
I have returned this error:
main.py", line 4, in <module>
from PyQt5.QtWebEngineWidgets import *
...
- 26.5k
63
votes
3
answers
38k
views
Should I use `app.exec()` or `app.exec_()` in my PyQt application?
I use Python 3 and PyQt5. Here's my test PyQt5 program, focus on the last 2 lines:
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import sys
class window(QWidget):
def __init__(self,parent=...
- 1,203
62
votes
21
answers
215k
views
PyQt5: How to install/run Qt Designer
Feeling really stupid, right now, but the title says it all:
How do you start the QtDesigner?
I've installed PyQt5 via pip and I believe to have identified the directory it's been installed in as
C:...
- 8,042
58
votes
4
answers
250k
views
How to get text in QlineEdit when QpushButton is pressed in a string?
I am trying to implement a function. My code is given below.
I want to get the text in lineedit with objectname 'host' in a string say 'shost' when the user clicks the pushbutton with name 'connect'. ...
- 17.7k
48
votes
8
answers
98k
views
Dark theme for Qt widgets?
Background
I'm building a PyQt5 application, that I'd like to have a dark theme for. Previously I've worked with Android development where there was a dark theme that I could set for a whole ...
- 2,081
48
votes
9
answers
237k
views
ImportError: No module named PytQt5
following are my python, qt and sip versions
root@thura:~# python -V
Python 2.7.3
root@thura:~# qmake --version
QMake version 3.0
Using Qt version 5.0.2 in /usr/lib/i386-linux-gnu
root@thura:~# sip -...
- 2,053
46
votes
11
answers
99k
views
Process finished with exit code -1073741819 (0xC0000005) Pycharm
I'm completly stuck on this. I keep getting error message
Process finished with exit code -1073741819 (0xC0000005)
I'm using pycharm with pyqt5.6 and qt5.6.2 and the problem started when I ...
- 1,438
44
votes
3
answers
163k
views
PyQt proper use of emit() and pyqtSignal()
I am reading through some documentation on PyQt5 to come up with a simple signal-slot mechanism. I have come to a halt due to a design consideration.
Consider the following code:
import sys
from ...
- 2,122
43
votes
1
answer
98k
views
PyQt5 failing import of QtGui
I've just moved from PyQt4 to 5 and I'm having an issue with QtGui. I installed using the 32bit windows installer, not my own build.
when I do:
from PyQt5 import QtGui
I get
class MainWindow(...
- 1,658
41
votes
30
answers
136k
views
DLL load failed when importing PyQt5
I have installed PyQt5 on windows platform and and getting an importError: DLL load failed.
I have installed pyqt5 using the command
pip3 install pyqt5
Successfully installed pyqt5-5.8.1
My ...
- 517
40
votes
5
answers
106k
views
How to build multiple .py files into a single executable file using pyinstaller?
I have made a small PyQt application containing 5-6 .py files. Now I want to build and compile them into a single main file, meaning it has to operate from one main window exe.
My .py files are ...
- 1,210
39
votes
1
answer
76k
views
How to set QComboBox to item from item's text in PyQt/PySide
Is it possible to set QComboBox to an item knowing only an item's text value? I am trying to avoid looping through for i in range(myCombobox.count()) just to find an item's index so it could be used ...
- 18.8k
37
votes
8
answers
49k
views
Install PyQt5 5.14.1 on Linux
pip3 install PyQt5
Collecting PyQt5
Using cached https://files.pythonhosted.org/packages/3a/fb/eb51731f2dc7c22d8e1a63ba88fb702727b324c6352183a32f27f73b8116/PyQt5-5.14.1.tar.gz
Complete output ...
- 542
37
votes
4
answers
23k
views
This application failed to start because it could not find or load the Qt platform plugin "cocoa"
I think I did everything I could in the last 20 hours, but nothing seems to work. My app is running and working -- just as it should -- the only problem I have is that I cannot create a .app bundle ...
- 12k
36
votes
4
answers
92k
views
Proper way to quit/exit a PyQt program
I have a script which has a login screen and if the cancel button is pressed, I want to exit the application altogether. I have tried 3 ways:
sys.exit()
QApplication.quit()
QCoreApplication.instance(...
- 896
33
votes
8
answers
31k
views
No name 'QApplication' in module 'PyQt5.QtWidgets' error in Pylint
Running into this issue in VS Code while trying to learn PyQt5, "No name 'QApplication' in module 'PyQt5.QtWidgets'", "No name 'QWidget' in module 'PyQt5.QtWidgets'"".
I'm not sure if this is a ...
- 1,092
32
votes
22
answers
249k
views
How to install PyQt5 on Windows?
When I try installing the PyQt5 on Windows using the command
python configure.py
I get this error:
Error: Make sure you have a working Qt qmake on your PATH.
I got the pyQt5 from PyQt5 Download.
...
- 1,314
32
votes
3
answers
85k
views
How to add items to a QComboBox in PyQt/PySide
I need some help adding some items to a QComboBox. So I have two comboboxes, and one populates the other depending on the item selected.
My question is that, using additem for new items, it works, ...
- 4,279
32
votes
2
answers
24k
views
Cannot load backend 'Qt5Agg' which requires the 'qt5' interactive framework, as 'headless' is currently running
I am trying to use Qt as matplotlib backend. i have checked it both on kaggle and google colab, but problem is same.
When i write
%matplotlib qt5
i got following error
ImportError: Cannot load ...
- 2,883
31
votes
5
answers
102k
views
Cannot import QtWebKitWidgets in PyQt5
I've recently upgraded PyQt5 from 5.5.1 to 5.6.0 using the Windows 32-bit installer here: https://www.riverbankcomputing.com/software/pyqt/download5. I've also upgraded my python from 3.4 to 3.5.
...
- 1,325
31
votes
2
answers
26k
views
Multiple inheritance metaclass conflict
I need a double inheritance for a class.
I tried several syntaxes but I don't understand the concept of metaclass.
from PyQt5.QtGui import QStandardItem
from configparser import ConfigParser
class ...
- 702
31
votes
1
answer
51k
views
Plotting matplotlib figure inside QWidget using Qt Designer form and PyQt5
I don't understand the best way to link a matplotlib figure to a form created from Qt Designer. I have a form I created in QtDesigner and then compiled to python through pyuic5. My main program is:
...
- 1,031
30
votes
4
answers
112k
views
How to install PyQt5 in Python 3 (Ubuntu 14.04)
I need to port some code that's Python2+PyQt4 to Python3+PyQt5.
I started installing pip3
sudo apt-get install python3-pip
Works great. Tried
sudo pip3 install PyQt5
Downloading/unpacking PyQt5
...
- 2,413
30
votes
2
answers
53k
views
PyQt5 cannot import name 'QApplication'
I am trying convert my code from PyQt4 to PyQt5 but I am getting errors.
from PyQt5.QtGui import QApplication, QPixmap
desktop = QApplication.desktop()
QPixmap.grabWindow(desktop.screen().winId())....
- 9,149
29
votes
8
answers
40k
views
How can I change the cursor shape with PyQt?
I have a simple application that runs a process that can last for several minutes before completing. I am trying to provide an indication to the user that it is processing the request - such as ...
- 14.7k
29
votes
3
answers
40k
views
How can I check if a keyboard modifier is pressed (Shift, Ctrl, or Alt)?
I am building a UI with Qt Creator and I want buttons to perform different actions with different modifiers. So I thought I could call functions with dynamic string properties that would perform the ...
- 349
29
votes
2
answers
8k
views
Why do I need to decorate connected slots with pyqtSlot?
I'm using pyqt5, and I have several methods connected using code similar to the following:
self.progress.canceled.connect(self.cancel)
Where, for example, self.cancel is:
def cancel(self):
self....
- 3,330
28
votes
13
answers
46k
views
How can I run pyqt5 on my Mac with M1chip (ppc64el architecture)?
Now. When I run it. The error comes
ImportError:
dlopen(/Users/v/Library/Python/3.8/lib/python/site-packages/PyQt5/QtWidgets.abi3.so,
2): no suitable image found. Did find:
/Users/v/Library/Python/3....
- 380
26
votes
7
answers
80k
views
Python PyQt5: How to show an error message with PyQt5
In normal Python (3.x) we always use showerror() from the tkinter module to display an error message but what should I do in PyQt5 to display exactly the same message type as well?
- 987
26
votes
9
answers
39k
views
Pip Install stuck on "Preparing Wheel metadata..." when trying to install PyQT5
I'm trying to install PyQT5 on my Raspberry Pi and used the command sudo pip3 install pyqt5.
But it has been stuck on that for over an hour nowand I'm starting to get frustrated, since it still moves, ...
user14490575
26
votes
3
answers
69k
views
PyQt showing video stream from opencv
Try to link PyQt and Opencv video feed, can't understand how to apply while loop for continuously streaming video. It just take a still picture.Please can anyone help to solve the problem.
PtQt=5
...
- 990
26
votes
5
answers
96k
views
PyQt5: Center align a label
This should be really simple but I just can't find an answer for this.
I've tried this PyQt4 code:
label.setAlignment(Qt.AlignCenter)
But that does not work.
- 1,264
26
votes
4
answers
38k
views
How to set current tab of QTabWidget by name?
PyQt5's QTabWidget has a method setCurrentIndex that you can use to get a particular tab to become the active tab. I can't seem to find any way to index by tab name though (which I set in Qt Designer)....
- 1,140
24
votes
5
answers
69k
views
How to set a window icon with PyQt5?
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class Application(QMainWindow):
def __init__(self):
super(Application, self).__init__()
...
- 341
23
votes
3
answers
48k
views
How to display a Pandas data frame with PyQt5/PySide2
I have a problem with the line below self.tableView.set??????????(df) that supposed to display the data frame in PyQt5. I put ??? there where I am missing the code I need.
def btn_clk(self):
...
- 6,581
23
votes
3
answers
44k
views
How to install PyQt5 on Windows for Python 2?
I am porting a Python 2 app which uses PyQt5 from Linux to Windows.
Question: How do I install PyQt5 on Windows?
What I have tried:
pip install PyQt5 fails with:
Downloading/unpacking PyQt5
...
- 14.8k
23
votes
7
answers
36k
views
Error when using pyinstaller: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff
I have an issue when i compile a PyQt code with pyinstaller.
I use this line to compile:
c:\Anaconda3\Scripts\pyinstaller.exe -y -F --distpath="." MyQt.py
then I get this error message:
File ...
- 4,830
22
votes
1
answer
63k
views
Get text from qtextedit and assign it to a variable
When I try to get the text from the qtextedit created with PyQt5 Designer I get an error or "Python stop working" and the script stop automatically. I've tried multiple solutions but nothing works. I ...
- 227
22
votes
2
answers
34k
views
ImportError: cannot import name 'QStringList' in PyQt5
I am using PyQt5 but can't import QStringList. I know that QStringList used to be in the module QtCore in PyQt4. So I try importing the class using
from PyQt5.QtCore import QStringList
but it shows ...
- 17.3k
22
votes
4
answers
24k
views
pylint can't find QWidget and QApplication
import sys
from PyQt5.QtWidgets import (QApplication, QWidget)
app = QApplication(sys.argv)
window = QWidget()
window.setGeometry(50, 50, 500, 300)
window.setWindowTitle('Hello, world')
window.show()
...
- 431
22
votes
2
answers
18k
views
PyQt5: Create semi-transparent window with non-transparent children
I want to create a fullscreen window with semitransparent background, but fully visible children widgets (kind of overlay effect).
Here's what I have so far:
import sys
from PyQt5.QtCore import *
...
- 629
20
votes
3
answers
28k
views
PyQt5: Keyboard shortcuts w/ QAction
How do I implement keyboard shortcuts (to run a function) in PyQt5? I see I'm supposed QAction in one way or another, but I can't put the two and two together, and all examples don't seem to work with ...
- 1,264
19
votes
4
answers
75k
views
Can't install PyQt5 using pip
I have tried to install PyQt5 using
pip install PyQt5
and
sudo -H pip install PyQt5
both of them give me the errors
ERROR: Could not find a version that satisfies the requirement PyQt5 (from ...
- 418
19
votes
2
answers
77k
views
How to apply stylesheet to a custom widget in PyQt
# -*- coding: utf-8 -*-
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class MainWindow(QWidget):
def __init__(self):
super(MainWindow, self).__init__()
self....
- 354
19
votes
2
answers
18k
views
PyQt: No error msg (traceback) on exit
My PyQt application no longer prints the error (stderr?) to the console.
I use QtDesigner and import the UI like this:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
from PyQt5.uic import ...
- 401
19
votes
1
answer
56k
views
AttributeError: 'Ui_MainWindow' object has no attribute 'setCentralWidget'
I am still working on the GUI for my Database and now i have a different error:
Traceback (most recent call last):
File "G:\Python\Database Kast Thuis\PyQt Test\MainMenu_ui.py", line 84, in <...
- 587
19
votes
1
answer
13k
views
qApp versus QApplication.instance()
With PyQt5, both of these return the application object:
app = QtWidgets.QApplication.instance()
app = QtWidgets.qApp
for i in app.arguments()[1:]:
...
But why does print(QtWidgets.QApplication....
- 693
19
votes
3
answers
13k
views
Why in pyqt5 should I use pyuic5 and not uic.loadUi("my.ui")?
I've been experimenting with QT5 for Python, using pyqt5. I've noticed that most tutorials recommend using pyuic5 to convert the XML UI to Python code. I've also seen a couple of tutorials where ...
- 459