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.
Related
I got the P4 python module for win10 via the installer on their page: https://www.perforce.com/downloads/helix-core-api-python
Its for python 3.9, though I have tested it with both Python 3.10 and 3.9 and it always throws the error: No module named 'P4' when I try to use it inside visual code.
Interpreter is set up correctly (tried 310 and 39).
Im a bit lost here and would love some help.
The installer package installed the following files into site-packages:
P4.py
P4API.cp39-win_amd64.pyd
and a folder with 4 metadata files in it
P4.py on itself looks good, no errors.
Edit: Im trying to use it with Blender. Currently shipped python version within that is 3.10.2. Also tried a older blender version which uses 3.9.7.
Both wont work.
Visual studio code is known for it's bugs with python. You could try using "PyCharm". Make sure to install the modules from Pycharm's settings instead of terminal.
(I'm not sure if this is the reason, but it's worth the try. Had the same issue and the mentioned way solved it.)
I have been trying to get SCons working now for quite a time, but didn't succeed yet. Before everything else: I'm running Windows 7 x64.
I have firstly installed Python 2.7.11 in C:\Software\Python27 and added both that directory as C:\Software\Python\Scripts to
the system path (for all users, that is). Then I installed SCons in C:\Software\Python27\Lib\site-packages\scons-2.4.1, and
the scripts in the previous mentioned scripts-directory (the directories which the SCons installation msi defaults to).
And now when I try to run SCons I get this error message:
Import failed. Unable to find SCons files in:
...
ImportError: No module named SCons.Script
As a user I really don't have any idea where the error comes from, other than that SCons can't resolve it's own imports.
I got it working by creating though by creating a new folder: C:\Software\Python27\Scripts\scons-local and moving the
contents of the SCons installation folder (...\Python27\Lib\site-packages\scons-2.4.1) to the newly created folder. But this
gives me a syntax error:
I found here that this error is due to my Python version not supporting conditional expressions, because this kind of
expressions are supported from Python 2.4 and higher. The thing is though that I am using Python 2.7.11, and thus I shouldn't get
this error.
Some help would be highly appreciated, thanks in advance!
The windows installer is no longer supported.
The best way to install SCons is now via pip
so:
python -Mpip install SCons
Note you will need Python 3.5 or newer (though at this point I'd suggest 3.10 or newer)
I'm using CXFreeze with PySide (QT). I get an error:
cx_Freeze: Python error in main script.
myscript.py line 33, in
File ExtensionLoader_Pyside_QtGUI.py, line 11, in
Import Error: DLL load failed: The specified module could not be found
When running a fresh install of Windows server 2008.
I'm running the frozen EXE package (with the folder). It seems to work on my own system and other systems. What might be the issue?
After reading, online, I tried to replace the Qt4Gui file, but this didn't solve the issue.
Python version is 2.7
Based on your Import Error: DLL load failed it is most likely an installation issue causing the missing DLL. To figure our exactly which DLL you are missing, use http://www.dependencywalker.com/ Run the .exe and open the .pyd file for File ExtensionLoader_Pyside_QtGUI.py and it will show you exactly which DLL's are missing and more importantly the locations where they should be. You can probably then track down the missing DLL online.
there are known issues with pyside 1.2.0 and cxFreeze. All should be fixed in development version (available on git repo). Please build the PySide from latest sources yourself or wait for PySide version 1.2.1. Build instructions are here [1].
[1] https://github.com/PySide/pyside-setup#building-pyside-on-a-windows-system
I used Py2exe instead of CXFreeze and it worked perfectly.
Also, apparently Python requires the MS Visual C++ Dependency Files:
http://www.microsoft.com/en-us/download/details.aspx?id=29
So any bundling needs that as well, if it's a fresh install. (Although I think they are now bundled with newer Windows versions.)
Other Notes:
In my experience, sometimes you should try CXFreeze, Py2EXE and PyInstaller quickly and see if one works best. As ideal as CXFreeze is re: cross platform, it just isn't going to happen perfectly.
Also, while I don't know if this was a factor, I set up a Windows 2000 Pro virtual machine and ran Py2exe on that. That was to ensure compatibility for all older Windows versions, and seemed to work well. (NOTE: Many things won't even run on Win2000 anymore so be careful that your other tools and libraries will run on it.)
Finally, be extra careful to match the bit level (32 vs 64) of all your libraries, and your Python install itself. If you have 32-bit python, ensure that your PySide, CXFreeze and any other libraries you use are 32-bit. (Or 64-bit if you're using 64-bit python.)
I just fixed a bug in a two year old python program and now I'm having big trouble getting it to compile again. I simply cannot get Python, Cairo, wx and distutils to work together.
On OSX I managed to get Python 2.7 to import Cairo and WX but py2app does not work. The error is something about unknown architecture.
On Windows 7 I have not been able to successfully import cairo. I installed py2cairo and put the libcairo-2.dll in Windows/System32 but still get an import error. I even copied msvcr90.dll to System32 but still no luck.
Does anyone have a combination of Python, wx, Py2cairo, Cairo and distutils that just works? I need Python 2.6 or 2.7 32 bit on OSX and Windows.
I got it to work on OSX by installing an older version of XCode form the SnowLeopard DVD.
You also have to be very careful with paths to data files because py2app puts everything into a zip file.
py2exe was worse because it did not copy dynamically loaded modules and one dependency from pytz into the repo and needed some ugly hacks in setup.py.
I ended up using cairo-1.10.2, libpng-1.2.49 and pixman-0.20.2
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