I have a PySide2 application, which doesn't run on Spyder due to some issues. However, PyQt5 runs fine. I would like to run the application in Spyder with PyQt5 but outside (console) with PySide2. I don't want to replace packages with search and replace at every deployment/development switch.
Checking with if 'dev' in sys.argv: works fine. However, problem is that I have files to be imported with inheritance classes inheriting classes from PySide2/PyQt5. e.g. Main.py inherits Dialog.py, which has a class Dialog(QDialog):. QDialog requires an import but I can't import PySide2 or PyQt5 in that file at that moment. I also can't pass any argument to the imported file afaik.
Is there any way to deal with such issues?
Basically I solved by checking arguments:
if 'dev' in sys.argv:
import PyQt5
else:
import PySide2
Then at every file, where I need to make a similar decision:
if 'PySide2' in sys.modules:
from PySide2 import QtCore, QtGui, QtWidgets
else:
from PyQt5 import QtCore, QtGui, QtWidgets
class Dialog(QtWidgets.QDialog):
...
When I run the main script with dev argument:
python main.py dev
then it runs with PyQt5, otherwise with PySide2
PS: This also works with cx_freeze excluding PyQt5 package, without any error.
I am new to PyQt and am currently working on a project which is was written in PyQt4. I need to update it to PyQt5 and have done most of it. However, when it comes to PyKDE, it generates the following error:
from PyKDE4.kdeui import KVBox, KHBox, KColorButton
RuntimeError: the PyQt4.QtCore and PyQt5.QtCore modules both wrap the QObject class
The code line using PyKDE4 is:
from PyKDE4.kdeui import KVBox, KHBox, KColorButton
Basically most of the code is already in PyQt5, but I haven't found a translation for PyKDE4. Anyone can help?
I am trying to embed a matplotlib canvas into a PySide2 application. I have tried to use this example: https://matplotlib.org/examples/user_interfaces/embedding_in_qt5.html
The example runs fine using PyQt5. However, if I change line 19 from
from PyQt5 import QtCore, QtWidgets
into
from PySide2 import QtCore, QtWidgets
then Python crashes with the message
Fatal Python error: deallocating None
as soon as the application window is closed. Is there any way to get this working properly using PySide2?
It turns out that this was a bug in PySide2, which now has been fixed (see https://bugreports.qt.io/browse/PYSIDE-632?gerritReviewStatus=All). Just update to the most current version to get rid of the problem.
I have python 2.7 under windows x64, I have been trying to make a simple GUI using PyQt4, like this:
from PyQt4 import *
from ui_mainwindow import Ui_MainWindow
class MainWindow(QtGui.QMainWindow, Ui_MainWindow):
when I run the program I have this error: " No module named ui_mainWindow"
-I have pyqt4 installed
- I have tried to replace um_mainwindow with ui_simple and clientGUI but the same error resulted.
What am I doing wrong and how to fix this?
thank you
As far as I know, ui_mainWindow is a python file generated by some Qt Tool, that transforms .ui file from QtDesigner to Python class.
I have no real experience with PyQT, but I know both C++/Qt and python. In C++/Qt QtCreator does the job of transforming .ui file to C++ class, but probably in python You need to do this Yourself.
I try to compile a Python project under Windows 7 using PyInstaller. The project works fine, there are no issues, however when I try to compile it the result doesn't work. Though I get no warnings during compilation there are many in the warnmain.txt file in the build directory: warnmain.txt
I don't really understand those warnings, for example "no module named numpy.pi" since numpy.pi is no module but a number. I never tried to import numpy.pi. I did import numpy and matplotlib explicitly. In addition I'm using PyQt4. I thought the error might be related to those libraries.
However I was able to compile a simple script which uses numpy succesfully:
import sys
from PyQt4 import QtGui, QtCore
import numpy as np
class MainWindow(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.pb = QtGui.QPushButton(str(np.pi), self)
app = QtGui.QApplication(sys.argv)
main = MainWindow()
main.show()
sys.exit(app.exec_())
Successfully here means that the created executable file actually showed the desired output. However there is also a warnmain.txt file created which contains exactly the same 'warnings' as the one before. So I guess the fact that compiling my actual project does not give any success is not (or at least not only) related to those warnings. But what else could be the error then? The only output during compilation are 'INFO's and none of the is a negative statement.
I did not specify an additional hook directory but the hooks where down using the default directory as far as I could read from the compile output, e.g. hook-matplotlib was executed. I could not see any hook for numpy neither could I for my small example script but this one worked. I used the following imports in my files (not all in the same but in different ones):
import numpy as np
import matplotlib.pyplot as ppl
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar
from PyQt4 import QtGui, QtCore
import json
import sys
import numpy # added this one later
import matplotlib # added this one later
Since PyInstaller does not give any errors/warnings I could not figure out if the problem is related to the libraries or if there is something else to be considered.
Had a similar problem with no module named FileDialog. Discovered that with version 3.2, I could use
pyinstaller --hidden-import FileDialog ...
instead of modifying my main script.
See Listing Hidden Imports documentation
Pyinstaller won't see second level imports. So if you import module A, pyinstaller sees this. But any additional module that is imported in A will not be seen.
There is no need to change anything in your python scripts. You can directly add the missing imports to the spec file.
Just change the following line:
hiddenimports=[],
to
hiddenimports=["Tkinter", "FileDialog"],
If you are getting ModuleNotFoundError: No module named ... errors and you:
call PyInstaller from a directory other than your main script's directory
use relative imports in your script
then your executable can have trouble finding the relative imports.
This can be fixed by:
calling PyInstaller from the same directory as your main script
OR removing any __init__.py files (empty __init__.py files are not required in Python 3.3+)
OR using PyInstaller's paths flag to specify a path to search for imports. E.g. if you are calling PyInstaller from a parent folder to your main script, and your script lives in subfolder, then call PyInstaller as such:
pyinstaller --paths=subfolder subfolder/script.py.
The problem were some runtime dependencies of matplotlib. So the compiling was fine while running the program threw some errors. Because the terminal closed itself immediately I didn't realize that. After redirecting stdout and stderr to a file I could see that I missed the libraries Tkinter and FileDialog. Adding two imports at the top of the main solved this problem.
I was facing the same problem and the following solution worked for me:
I first removed the virtual environment in which I was working.
Reinstalled all the modules using pip (note: this time I did not create any virtual environment).
Then I called the pyinstaller.
The .exe file created thereafter executed smoothly, without any module import error.
I had the same problem with pyinstaller 3.0 and weblib. Importing it in the main didn't help.
Upgrading to 3.1 and deleting all build files helped.
pip install --upgrade pyinstaller
If the matter is that you don't need Tkinter and friends because you are using PyQt4, then it might be best to avoid loading Tkinter etc altogether. Look into /etc/matplotlibrc and change the defaults to PyQt4, see the 'modified' lines below:
#### CONFIGURATION BEGINS HERE
# The default backend; one of GTK GTKAgg GTKCairo GTK3Agg GTK3Cairo
# CocoaAgg MacOSX Qt4Agg Qt5Agg TkAgg WX WXAgg Agg Cairo GDK PS PDF SVG
# Template.
# You can also deploy your own backend outside of matplotlib by
# referring to the module name (which must be in the PYTHONPATH) as
# 'module://my_backend'.
#modified
#backend : TkAgg
backend : Qt4Agg
# If you are using the Qt4Agg backend, you can choose here
# to use the PyQt4 bindings or the newer PySide bindings to
# the underlying Qt4 toolkit.
#modified
#backend.qt4 : PyQt4 # PyQt4 | PySide
backend.qt4 : PyQt4 # PyQt4 | PySide
May not be a good practice but installing pyinstaller in the original environment used in my project (instead of a separate venv) helped resolve ModuleNotFoundError
I had similar problem with PySimpleGUI.
The problem was, pyinstaller was installed in different directory.
SOLUTION (solved for me) : just install pyinstaller in the same directory in which the file is present (that to be converted to exe)
If these solutions don't work, simply deleting and reinstalling pyinstaller can fix this for you (as it did for me just now).
Putting this here for anyone else who might come across this post.
I had the same error. Mine said "ModuleNotFoundError: No module named 'numpy'". I fixed it by typing the following in the cmd:
pip install pyinstaller numpy