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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(QtGui.QMainWindow, UI.MainUI.Ui_MainWindow):
AttributeError: 'module' object has no attribute 'QMainWindow'
so I tried
from PyQt5.QtWidgets import QtGui
Which results in:
ImportError: cannot import name QtGui
then I tried to change the sys.path according to Pyinstaller: ImportError: cannot import name QtGui work around but it still gives me the same
ImportError: cannot import name QtGui
Update: It looks like I do in fact import QtGui because when I go in IDLE and try it, it still autocompletes QMovie and a whole bunch of other attributes. Is there any reason QMainWindow just wouldn't be in there? (It's not, neither is QDialog and they seem important)
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Enter the mainloop of application by app.Import QtCore, QtGui and QtWidgets modules from PyQt5 package. Create an application object of QApplication class. Add a QLabel object and set the caption of label as "hello world". Define the size and position of window by setGeometry() method.
Versions. PyQt version 4 works with both Qt 4 and Qt 5. PyQt version 5 only supports Qt version 5, and drops support for features that are deprecated in Qt 5.
The upgrade path from PyQt5 to PyQt6 is fairly straightforward, with one main gotcha. For some applications, just renaming the imports from PyQt5 to PyQt6 will be enough to convert your application to work with the new library. For most however, you will need to account for changes in both PyQt and Qt itself.
QApplication specializes QGuiApplication with some functionality needed for QWidget -based applications. It handles widget specific initialization, finalization. For any GUI application using Qt, there is precisely one QApplication object, no matter whether the application has 0, 1, 2 or more windows at any given time.
Assuming everything was installed correctly, you need to adjust your imports slightly to port from PyQt4 to PyQt5.
The main GUI elements are in the QtWidgets module, whilst the more basic GUI elements are in QtGui. See the Qt modules page for more details.
The example code needs to be changed to something like:
from PyQt5 import QtCore, QtGui, QtWidgets class MainWindow(QtWidgets.QMainWindow, UI.MainUI.Ui_MainWindow): ... For more details on porting from PyQt4 to PyQt5, see: Differences Between PyQt4 and PyQt5.
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