So, i developed a small python program with my machine.. I use some libraries like PyQt5 xlsxwriter.. Now, i get my exe with pyinstaller, but i discovered that users machine have 32bit system.. With vscode i easily change the python interpreter to rebuild with py 3.8 32 bit, but in this way, i have a error with the module import: Both PyQt5 and xlsxwriter are impossible to found.. I try to unistall e install it again, but never. I certainly wrong somthing but my basket of ideas isover..
Sorry for my English
Good day evryone!
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I have a python package that acts like a wrapper for a .dll written in C#. The binary is imported into python by the pythonnet package. Thus, the user can access the functionality of the so called cs_backend.dll conveniently from the python side. The import looks as follows:
import clr as __clr
import System as __System
__clr.AddReference(PATH_TO_CS_BACKEND + "\\cs_backend")
import cs_backend as __csb # exception thrown here
However, it seems that python can't import the .dll as I get a ModuleNotFoundError: No module named 'cs_backend'.
The odd thing is that this error only occures when running the code from Spyder. Executing exactly the same code from Visual Studio Code works perfectly fine.
Do you have any idea what the problem could be?
system specifications
os: windows 10
.net framework v4.5.1
python 3.8.5
spyder 4.2.1
Edit:
I have found a github issue on the pythonnet repository that describes a similar (although not quite the same) problem. However, since it has been open for about 3 years, it seems that there is little to no progress on that.
Edit 2:
There is a similar question here on stack overflow. The solution was to install a newer .NET Framework. This is not my problem since with any IDE other than Spyder the code works just fine. Thus, I guess that this is mainly a Spyder issue.
Currently, it seems that there is neither a solution nor an effort to resolve this problem.
It looks like the problem is caused by the IPython console integrated in Spyder.
A simple workaround is to execute the python script from the system console.
In Spyder this can be done by going to Run - Configuration per file - Execute in external system console.
With the new configuration it is at least possible to run the script.
I have installed PyQt5 using the windows installer. I have tried creating some windows and stuff and it works great. Still, pycharm seems to not like PyQt5 very much, and is marking errors everywhere in my code.
As I said, PyQt5 is working great, but it's kind of annoying to have those errors which, by the way, i can not alt + enter + ignore them.
I guess it's just a matter of adding references or something to pycharm, but I have no idea how to do it and I have already spent 1 hour trying to look for solutions in stack-overflow, and none of them work. I have also tried re-installing it.
I am using windows 7 64 bits, python 3.4, and PyQt5 of 32bits because 64 didn't work for some reason.
I had similar problem because I had both PyQt4 and PyQt5 installed.
In general this can cause all sorts of problem, so the spyder-ide guys made the qtpy package, which gives an abstraction on top of the PyQt5/PyQt4/PySide.
Nowdays the qtpy is a standard library in the Anaconda distribution, and you can call it instead of PyQt5/PySide likes this:
from qtpy.QtCore import QFile, QFileInfo
from qtpy.QtGui import QIcon, QKeySequence, QPixmap
It solved me this specific problem in PyCharm.
I also have both 32 bit and 64 bit Python v3.5 and PyQt5 versions installed. That should not matter because I installed the 32 bit PyQt5 package in the 32 bit PI and the 64 bit PyQt5 package in the 64 bit PI. I installed the PyQt5 packages from Riverbanks's PyQt5 web site. Christopher Gohlke does not have them yet on his Windows extensions site, nor does PyCharm's PI dialog even list PyQt5 as an available package.
PyCharm does indeed incorrectly flag numerous warnings whether I choose the 32 bit PI or the 64 bit PI for the PyQt5 project I am working on. This appears to be a cosmetic bug only for PyQt5 code, since the code does run correctly, even if I run the code from PyCharm's Terminal window. Also, note that PyQt5 is not listed in PyCharm's PI settings dialog, even though Windows 10 File Explorer does indeed list the proper packages in the proper site-packages folder. Doing a PyCharm Invalidate/Restart does not help.
That said, you do not have to, nor should you, suppress warnings for everything. Just suppress warnings on a case by case basis only for PyCharm's incorrect PyQt5 warnings. You can do it like this:
def __init__(self):
# noinspection PyArgumentList
super().__init__()
In my case I needed in my PyCharm to go File -> Settings -> Project: MyProject -> Project structure and chose correct Project Interpreter
Another probable and easy means is to:
open the command prompt as an administrator
type in 'pip' (without the quotes)
type in: pip show PyQt5 (this shows you where PyQt5 has been installed.
follow the trace given to you from the command prompt. Now, open the folder 'site-packages' and copy every folder termed' PyQt5' to the 'lib' folder instead (ignoring those with '.. - info' is inconsequential).
In Pycharm or Visual studios, the red underline goes off and the problem of 'unresolved reference' is eliminated.
I wrote a genetic algorithm program using the inspyred library with a 32bit Python2.7 version on a 64bit Win7 machine. While generating the population the program stops running when it uses memory up to 1959044K.
I have read a number of questions on this site, and I understand that it is due to a 2GB cap on 32bit programs by the OS. So I have tried to switch to a 64bit Python and install the 64bit versions of the modules I was working with, unfortunately all but one module cannot run on the 64bit platform.
I also installed pywin32 as advised in another question but that has failed to help too. This module is not a standard Python library and I have pasted it below. The error message I get is:
import AoN
ImportError: DLL load failed: %1 is not a valid Win32 application.
My understanding is that the 64bit Python does not recognize the 32bit module. I also read here: http://effbot.org/zone/python-compile.htm about compiling the source code, but I have compiled the source code in 64bit but that does not help either as it continues to give that error.
Lastly I pasted the directory path of the module in the interpreter path but that does not help too.
Is there a way to have this module run on the 64bit Python?
And please can anyone explain the process of compiling source codes and if that can help me out?
The answer is simple - it can't work. A process is either 32 or 64 bit, it's as simple as that. So if there is one module that can't run in 64 bit, one option besides re-compiling the module for 64 bit is to delegate whatever purpose it has to a second process running in 32 bit, just doing that. This might or might not be practical, depending on the actual task of the module.
I tried to install pywin32 via the 32 bit python 2.6 msi installer and got this error:
I have no idea why, so I went and installed python 2.7 and tried again with the pywin32 2.7 installer and got an error that amounted to another error (Sorry for not being more specific, but python 2.7 is now gone from my computer. The error was incredibly vague and had "Error:" and then no more text after it if I recall correctly).
I can't figure out what this error means, however. I wanted to use pyinstaller but it requires pywin32, so after I couldn't install pywin32 I tried py2exe and got this error:
*** finding dlls needed ***
error: pywintypes26.dll: No such file or directory
So I'm pretty sure I need pywin32. Anyone have any ideas?
I don't know the cause, but I got the same error (only with different line numbers, maybe from a different version of pywin32), and this fix worked for me, installing on windows 7:
Extract the installer file to a directory using the free 7zip (or similar) program
Copy everything in the PLATLIB directory to C:\Python26\Lib\site-packages
Open a command prompt to the SCRIPT directory and type:
python pywin32_postinstall.py -install
You must have Python already installed (perhaps obviously) and in your windows PATH environment variable for this to work. You can also try the testall script in that PLATLIB directory (though for me, that hung). After doing this, I was able to import pywin32 modules from the Python IDLE just fine.
(Trying to run the installer in compatibility mode didn't solve this for me.)
I did the following and worked for version 2.7 (I did not try 3.0 and up, but it should work too):
Move the .exe file into the platlib (C:\Python27\Lib\site-packages)
Run as admin the .exe file and you should be Good :)
If you want to check if it worked just do: import win32api and run it.
As of when I wrote this (Feb'12), IMO Python 2.5 is the most stable version of Python on Windows. I suggest you try re-installing everything on Python 2.5. I use it on Windows 7 and I don't have any issues whatsoever
I've been trying to install PyQt 4.7 on Vista, but I am getting an ImportError when I try to do: from PyQt4 import QtCore, QtGui.
ImportError: DLL load failed: The specified module could not be found.
I've checked my System Path, and C:\Python31\Lib\site-packages\PyQt4\bin is on there.
I can't run any of the examples, but the Designer, Assistant and Linguist run fine.
I am using ActivePython 3.1, if that makes any difference. And I haven't had any previous version of PyQt installed.
Edit:
I've copied the QtCore4 and GtGui4 dlls to C:\Python31\Lib\site-packages\PyQt4. That fixes some of the examples, but I still can't use the example browser.
Are you sure there is a \bin directory for your version of PyQt?
I am running PyQt 4.4, and all my binaries are right in:
C:\Python31\Lib\site-packages\PyQt4
Which is what I have my path pointing too.
It sounds like PyQt4 was installed improperly... did you run this?
python setup.py install
There shouldn't be a bin there...
Just wanted to chime in that I had the same problem on a WinXP install of:
python 2.7
Qt 4.7.1 (10.05)
PyQt 4.8.1
I used the windows installer version of all 3 of those items.
Copying the contents of the C:\Python27\Lib\site-packages\PyQt4\bin folder up to the main PyQt folder (C:\Python27\Lib\site-packages\PyQt4) stopped the 'dll not found' errors that python was throwing.
Also chiming in. I installed both python 2.6 and PyQt 4.8.3 on a Windows 7 machine using the windows installers (I did NOT run 'python setup.py install').
I tried to run spyder (which requires PyQt 4.4 or greater) and failed because it couldn't find the PyQt .dlls. I copied all the .dlls from the \Lib\site-packages\PyQt4\bin folder to the \Lib\site-packages\PyQt4 folder, and spyder launches just fine.
PyQt installation also depends on the version of python installed on your platform.Python3.+ is incompatible with Python version < 3.x.
I was facing the same problem as I have Python 2.7 installed on my machine but I downloaded the latest binary which was PyQt-Py3.2-x86-gpl-4.9.exe. If you see here the binary has python version also mentioned in name after PyQt which is Py3.2. I uninstalled PyQt and installed PyQt-Py2.7-x86-gpl-4.9.exe which points to Python 2.7 and it fixed the problem.
Probably they could have mentioned the naming convention online or in some documentation to be more simpler.
I had the same problem. I got my program running from within Eclipse but when I tried running it directly from the command line I still got the same error.
I solved it by renaming the C:\Users\Me\AppData\Roaming\Python\Python27\site-packages\PyQt4 directory. (I'm guessing leftovers from a previous PyQt install)
I am using ActivePython.
I think there are at least two possible error conditions
1. ImportError: DLL load failed: The specified module could not be found.
then you have to check your PyQT version is comptible with your python. In other words, if you use python 3.3, then you can only use PyQT for python3.3 and python 3.3 will not work with PyQT for python3.4
This was the problem I met. I solved it with re-install it
2. Import Error: DLL load failed: %1 then something strange on a different encoding Win32.
then it would be a OS problem. If you use 32bit Python then you have to use 32bit PyQt, so do 64bit
Here's how I could fix those errors on Windows 7:
Get the PyQt4 wheel from
http://www.lfd.uci.edu/~gohlke/pythonlibs/#pyqt4.
Make sure that the version is exactly the same as your Python version (i.e. Python 3.3 doesn't work with PyQT for Python 3.4). Also make sure to download the 64bit version if you are on a 64bit machine and vice versa.
Extract the wheel with 7zip
Rename the PyQt4-4.11.4.data (or similar) directory to PyQt4
Go to PyQt4\purelib\PyQt4\ and move everything to the root PyQt4 folder. You can delete the purelib folder now
Copy the whole PyQt4 folder to your Python interpreters 'site-packages' folder (e.g. C:\Python34\Lib\site-packages)
Go to PyQt4\data\Lib\site-packages and move all the files to C:\Python34\Lib\site-packages\
In my case I needed MSVCP140.dll. I have solved this problem by dowloading Visual C++ Redistributable for Visual Studio 2015:
https://www.microsoft.com/en-us/download/details.aspx?id=48145
Got this solution from MSVCP140.dll missing
I am using Pyqt4 and Python 3.6 in Windows7.