PyQT4 App

[JonB]

@Mitko
I don't think this is actually anything to do with PyQt, or Qt. If you had copied and pasted the text instead of screenshot I could have quoted from it. But I see a Python3.8 json library loader complaining about some character in its JSON input.

[Mitko]

@JonB

The error was, because part one of the files (the json), containing the xbee commands, has Russian in it, so the problem was with UTF-8 encoding, but i fix it.
But now i have the following problem:

File "C:/xbee-gui-master/MainForm.py", line 18, in <module>
    class Block(QtGui.QMainWindow, QtGui.QTreeView):
NameError: name 'QtGui' is not defined

How to solve it ?

[JonB]

@Mitko
Qt5 moved widget code from QtGui to QtWidgets, change to that. You will have to do the same for any other widget stuff. I gave you reference to https://wiki.qt.io/Transition_from_Qt_4.x_to_Qt5 for this --- it's the very first item there --- and told you that's what I used to do the porting work.

[Mitko]

@JonB
I began to solve this problem, but now i have this error:

 C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
Traceback (most recent call last):
  File "C:/xbee-gui-master/MainForm.py", line 360, in <module>
    main()
  File "C:/xbee-gui-master/MainForm.py", line 355, in main
    bl = Block()
  File "C:/xbee-gui-master/MainForm.py", line 26, in __init__
    self.setWindowIcon(QtWidgets.QIcon("zigbee.png"))
AttributeError: module 'PyQt5.QtWidgets' has no attribute 'QIcon'

[jsulm]

@Mitko said in PyQT4 App:

QIcon

This one is in gui module.
I guess in PyQt it is PyQt5.QtGui

[Mitko]

@jsulm

I change it, but now i have this:

 C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
Traceback (most recent call last):
  File "C:/xbee-gui-master/MainForm.py", line 360, in <module>
    main()
  File "C:/xbee-gui-master/MainForm.py", line 355, in main
    bl = Block()
  File "C:/xbee-gui-master/MainForm.py", line 26, in __init__
    self.setWindowIcon(QtWidgets.QGui("zigbee.png"))
AttributeError: module 'PyQt5.QtWidgets' has no attribute 'QGui'

[jsulm]

@Mitko said in PyQT4 App:

PyQt5.QtWidgets' has no attribute 'QGui'

I did not suggest to write QtWidgets.QGui but PyQt5.QtGui

[Mitko]

@jsulm

 C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
Traceback (most recent call last):
  File "C:/xbee-gui-master/MainForm.py", line 360, in <module>
    main()
  File "C:/xbee-gui-master/MainForm.py", line 355, in main
    bl = Block()
  File "C:/xbee-gui-master/MainForm.py", line 26, in __init__
    self.setWindowIcon(PyQt5.QGui("zigbee.png"))
NameError: name 'PyQt5' is not defined 

[jsulm]

@Mitko said in PyQT4 App:

PyQt5.QGui("zigbee.png")

What is this?! You want to use QIcon, right?
It should be I guess

QtGui.QIcon("zigbee.png")

It is also shown in the documentation which you should consult: https://doc.qt.io/qtforpython-5/PySide2/QtGui/QIcon.html

[Mitko]

@jsulm

 C:\xbee-gui-master\PyQT\Scripts\python.exe C:/xbee-gui-master/MainForm.py
Traceback (most recent call last):
  File "C:/xbee-gui-master/MainForm.py", line 360, in <module>
    main()
  File "C:/xbee-gui-master/MainForm.py", line 355, in main
    bl = Block()
  File "C:/xbee-gui-master/MainForm.py", line 26, in __init__
    self.setWindowIcon(QtGui.QIcon("zigbee.png"))
NameError: name 'QtGui' is not defined 

[jsulm]

@Mitko said in PyQT4 App:

name 'QtGui' is not defined

You of course have to import this module like any other module

[Mitko]

@jsulm
Via Interpreter ? I've try, it seems to installed, but i've got same error

[jsulm]

@Mitko said in PyQT4 App:

Via Interpreter ?

Don't know what you mean.

from PyQt5 import QtGui

[Mitko]

@jsulm
Thank you, i fix this

But now i have this:

 Traceback (most recent call last):
  File "C:/xbee-gui-master/MainForm.py", line 360, in <module>
    main()
  File "C:/xbee-gui-master/MainForm.py", line 355, in main
    bl = Block()
  File "C:/xbee-gui-master/MainForm.py", line 28, in __init__
    self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)
AttributeError: module 'PyQt5.QtGui' has no attribute 'QVBoxLayout'

[jsulm]

@Mitko said in PyQT4 App:

QVBoxLayout

Please do also some research on your own!
If you google for QVBoxLayout you will find https://doc.qt.io/qt-5/qvboxlayout.html and there it is clearly stated that it is in widgets module (qmake: QT += widgets).

[Mitko]

@jsulm
I'm new and don't understand everything

[Mitko]

@jsulm

I've try this but i have same error

from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QHBoxLayout,
                             QPushButton, QLabel, QLineEdit, QTabBar,
                             QFrame, QStackedLayout)

[JonB]

@Mitko
You should only get the same error if you left the code with QtGui.QVBoxLayout(self.centralWidget). After the import it should work with plain QVBoxLayout(self.centralWidget). Otherwise please don't say " same error" when so many errors are flying around, please show the actual line of any error and paste the error message.

[Mitko]

@JonB

When i use:

from PyQt5 import QtWidgets, QtCore, QtGui, QVBoxLayout

I have this:

File "C:/xbee-gui-master/MainForm.py", line 3, in <module>
 from PyQt5 import QtWidgets, QtCore, QtGui, QVBoxLayout
ImportError: cannot import name 'QVBoxLayout' from 'PyQt5' (C:\xbee-gui-master\PyQT\lib\site-packages\PyQt5\__init__.py)

When i use:

from PyQt5 import QtWidgets, QtCore, QtGui

from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, QHBoxLayout,
                             QPushButton, QLabel, QLineEdit, QTabBar,
                             QFrame, QStackedLayout)

I have this:

File "C:/xbee-gui-master/MainForm.py", line 35, in __init__
   self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)
AttributeError: module 'PyQt5.QtGui' has no attribute 'QVBoxLayout'

[JonB]

@Mitko
The first error is correct. from PyQt5 import QtWidgets, QtCore, QtGui is good. QVBoxLayout is not in PyQt5, so the error is correct.

Your second example is correct. QtWidgets does contain QVBoxLayout so that is good.

Given which, it is hardly surprising that

self.centralWidgetLayout = QtGui.QVBoxLayout(self.centralWidget)

gives the error it does, is it? You know that QVBoxLayout has been moved from QtGui in Qt 4 to QtWidgets in Qt 5, don't you, because that is what you are supposed to be changing to make it work. So there's no point putting what used to work and does not work now.

Given your second example code, there are two ways you can address QVBoxLayout:

• QtWidgets.QVBoxLayout: This is allowed from your from PyQt5 import QtWidgets line.

• QVBoxLayout: This is allowed from your from PyQt5.QtWidgets import (QApplication, QWidget, QVBoxLayout, ... line.