I used to create a big program in Python 2.7 that uses MySQLdb a long time ago. I developed it both on Mac OS and PC.
I just had to re-refomat my Mac and I'm now on Mojave. Whereas I have been able in the past to easily install MySQLdb, I'm unable to do so now.
I've tried all that was available on the forums with no success.
PIP, easy-install, Brew and many other solutions that I forgot.
Even "easy_install MySQL-python" found in Installing MySQLDB on Python 2.7.3 under CentOS gave me an error ending by :
EnvironmentError: mysql_config not found
I expect to be able to "import MySQLdb" in my Python code, but MySQLdb isn't installed and so "no found"
Thanks a lot for your help.
So, you either have upgrade your MySQL Version to a 64Bit Version, get the newest MySQL-Python Connector, update your code and use this instead of MySQLdb. Which is the safest and best solution, but u have to put in some work (no problem if your code isn't that long anyways...)
https://dev.mysql.com/downloads/connector/python/
https://dev.mysql.com/doc/connector-python/en/connector-python-example-connecting.html
import mysql.connector
Second chance is, staying with your old 32Bit MySQL Version (for Example 5.6.20 32Bit), and still using the same old MySQL Python Connector (For Example Mysql-Python Connector 1.2.3 in 32Bit, found on the Mysql Download page aswell) you used before. There will be some popup errors, such as a few Libraries are out of date and probably not compatible anymore, but it's working.
We seem to be running into a problem downloading opencv which is a dependency for gym-gazebo. Seems opencv works for Python 2.7 but gym-gazebo requires Python 3.5.
We tried fixing it by going into the bash file and tweeking a bit with Python path. We got to a point where opencv can be imported but rospy which is an essential module won't get imported.
We have this error :
ImportError: /opt/ros/kinetic/lib/python2.7/dist-packages/cv2.so: undefined symbol: PyCObject_Type
Any advice?
Python modules with binary code need to be built for the specific python version.
Install opencv for python 3.5 using whatever python package manager is on your system (conda / pip etc).
If you are on windows you might want to bookmark Unofficial python builds
I am attempting to pip install the fintech library (I get the same error with easy_install) but it is returning "Sorry, platform or Python version not supported."
I am running 3.5.2 in venv in OSX (I get the same error with 2.7 as well as in Windows). The latest version of the package was upgraded to support 3.5.
Any idea what I am doing wrong?
EDIT: Python is 64bit and here is the full message.
EDIT 2: Looking into it - it seems this is the core of the issue. It attempts to download the package by generating a URL with this code:
extension = Extension(nativestring('fintech'), [nativestring(
'http://www.joonis.de/pyfintech/v%s/fintech-%s-py%s-ucs%i-%s-%sbit.zip' % (
PKG_VERSION,
PKG_VERSION,
'%i.%i' % sys.version_info[:2],
sys.maxunicode == 0xffff and 2 or 4, # UCS-2 or UCS-4
platform.system().lower(),
struct.calcsize(b'P') * 8, # Py2.6 requires a byte string
))], language='download')
The URL that is generated by my system is: http://www.joonis.de/pyfintech/v4.3.0/fintech-4.3.0-py3.5-ucs4-darwin-64bit.zip which does return 404 from the server.
EDIT3: It appears that it is the -darwin- that is causing the issue. Both -windows- and -linux- generate good URLs. I will see what the URL generated on my windows machine is later on today.
EDIT4: My Windows python version was 32bit which is what was causing the issue there. So from what I can tell you need 64bit python running on linux or windows to use this package.
This package requires 64bit Python and only seems to support windows and linux.
EDIT: The developer has gotten back to me and has uploaded a binary for python 3.5 and 3.4.
Note - they state "...the compiler has some issues on macOS with Python 3."
I have a situation very much like the one at Error "ImportError: DLL load failed: %1 is not a valid Win32 application", but the answer there isn't working for me.
My Python code says:
import cv2
But that line throws the error shown in the title of this question.
I have OpenCV installed in C:\lib\opencv on this 64-bit machine. I'm using 64-bit Python.
My PYTHONPATH variable: PYTHONPATH=C:\lib\opencv\build\python\2.7. This folder contains cv2.pyd and that's all.
My PATH variable: Path=%OPENCV_DIR%\bin;... This folder contains 39 DLL files such as opencv_core246d.dll.
OPENCV_DIR has this value: OPENCV_DIR=C:\lib\opencv\build\x64\vc11.
The solution at Error "ImportError: DLL load failed: %1 is not a valid Win32 application" says to add "the new opencv binaries path (C:\opencv\build\bin\Release) to the Windows PATH environment variable". But as shown above, I already have the OpenCV binaries folder (C:\lib\opencv\build\x64\vc11\bin) in my PATH. And my OpenCV installation doesn't have any Release folders (except for an empty one under build/java).
What's going wrong? Can I tell Python to verbosely trace the loading process? Exactly what DLL files is it looking for?
I noticed that, according to http://www.dependencywalker.com/, the cv2.pyd in C:\lib\opencv\build\python\2.7 is 32-bit, whereas the machine and the Python I'm running are 64-bit. Could that be the problem? And if so, where can I find a 64-bit version of cv2.pyd?
Unofficial Windows Binaries for Python Extension Packages
You can find any Python libraries from here.
Please check if the Python version you are using is also 64 bit. If not then that could be the issue. You would be using a 32-bit Python version and would have installed a 64 bit binaries for the OpenCV library.
Wow, I found yet another case for this problem. None of the above worked. Eventually I used python's ability to introspect what was being loaded. For Python 2.7, this means:
import imp
imp.find_module("cv2")
This turned up a completely unexpected "cv2.pyd" file in an Anaconda DLL directory that wasn't touched by multiple uninstall/install attempts. Python was looking there first and not finding my good installation. I deleted that cv2.pyd file and tried imp.find_module("cv2") again and python immediately found the right file and cv2 started working.
So if none of the other solutions work for you, make sure you use Python introspection to see what file Python is trying to load.
In my case, I have 64-bit Python, and it was lxml that was the wrong version--I should have been using the x64 version of that as well. I solved this by downloading the 64-bit version of lxml here:
https://pypi.python.org/pypi/lxml/3.4.1
lxml-3.4.1.win-amd64-py2.7.exe
This was the simplest answer to a frustrating issue.
I just had this problem. It turns out it was just because I was using an 64-bit version of the OpenCV file. I tried the x86 and it worked.
I had the same problem. Here's what I did:
I downloaded the pywin32 wheel file from here, then
I uninstalled the pywin32 module. To uninstall, execute the following command in a command prompt.
pip uninstall pywin32
Then, I reinstalled pywin32. To install it, open the command prompt in the same directory where the pywin32 wheel file lies. Then execute the following command.
pip install <Name of the wheel file with extension>
Wheel file will be like: piwin32-XXX-cpXX-none-win32.whl
It solves the problem for me.
I copied cv2.pyd file from /opencv/build/python/2.7/x86 folder instead of from /x64 folder to C:/Python27/Lib/site-packeges. I followed rest of the instructions provided here.
Added by someone else, not verified: I also copy file cv2.pyd to folder C:/Python27/Lib/site-packages/cv2. It works.
For me the problem was that I was using different versions of Python in the same Eclipse project. My setup was not consistent with the Project Properties and the Run Configuration Python versions.
In menu Project → Properties → PyDev, I had the Interpreter set to Python 2.7.11.
In Run Configurations → Interpreter, I was using the Default Interpreter. Changing it to Python 2.7.11 fixed the problem.
If your build system (CMake in my case) copies the file from <name>.dll to <name>.pyd, you will get this error if the original file wasn't actually a DLL file. In my case, building shared libraries got switched off, so the underlying file was actually a *.lib.
I discovered this error by loading the pyd file in Dependency Walker and finding that it wasn't valid.
Update NumPy.
pip install numpy --upgrade
It works for me!
This one worked for me:
pip install -- pywin32==227
I faced the same issue when I uninstalled and reinstalled a different version of 2.7.x of Python on my system using a 32-bit Windows Installer. I got the same error on most of my import statements.
I uninstalled the newly installed Python, downloaded a 64-bit Windows installer, reinstalled Python again, and it worked.
So I had problems installing vtk under Windows (as I use Python 3.7, there isn't any binary available so far. Just for older Python versions pip install vtk is not working)
I did wrote Python in my cmd:
Python 3.7.3 on win32
So I now know I have Python 3.7.3 running on a 32 bit.
I then downloaded the correct wheel at VTK‑8.2.0‑cp37‑cp37m‑win32.whl
Next I installed that wheel:
pip install VTK-8.2.0-cp37-cp37m-win32.whl
Then I tested it and it worked:
python
import vtk
I experienced the same problem while trying to write code concerning speech-to-text.
The solution was very simple. Uninstall the previous pywin32 using the pip method:
pip uninstall pywin32
The above will remove the existing one which is by default for 32 bit computers. And install it again using
pip install pywin32
This will install the one for the 64 bit computer which you are using.
I had a similar issue while trying to run uvicorn,
Creating a new virtual environment and reinstalling the python packages worked
You can install opencv from official or unofficial sites.
Refer to this question and this issue if you are using Anaconda.
It has a very simple solution.
After installing opencv
place
cv2.pyd from C:\opencv\build\python\2.7\ **x64** to C:\Python27\Lib\site-packages
instead of, place cv2.pyd from C:\opencv\build\python\2.7\ **x86** to C:\Python27\Lib\site-packages
I got this error when trying to import MySQLdb.
What worked for me was to uninstall Python and then reinstall it.
I got the error after installing npm (https://www.npmjs.com/get-npm). One thing it did was install Python even though I already had it.
First I copied cv2.pyd from /opencv/build/python/2.7/x86 to C:/Python27/Lib/site-packeges. The error was
"RuntimeError: module compiled against API version 9 but this version of numpy is 7"
Then I installed numpy-1.8.0-win32-superpack-python2.7.exe and OpenCV works fine.
>>> import cv2
>>> print cv2.__version__
2.4.13
Please make sure that you have installed a Python 2.7.12 or below version. Otherwise you will definitely get this error.
Make sure the Oracle client is 64 bit installed if the OS is 64 bit.
Make sure the Microsoft Visual C++ compiler for Python 2.7 is 64 for bit for a 64 bit OS or 32 bit for 32 bit.
Note: If your OS is 64 bit, install all packages of 64 bit or if the OS is 32 bit, install the 32-bit package.
This has worked for me. I have tried different methods, but this was my best solution.
Open a command prompt and type the following;
pip install opencv-python
(Make sure your Internet connection is on.)
After that, try importing it again.
It could also be that your Anaconda version is 32 bit when it should be 64 bit.
If you are using pycharm I go to settings -> python interpretation and click the + button and search for the name on the list of python packages there
An image showing where to go when you want to install something
I found the solution. Maybe you can try to use the cmd window rather than the Anaconda prompt window to start your first Scrapy test.
I am trying to get NumPy to work on my new Windows 8 installation, with Python 3.3 installed. When I try (both) installers from here, they crash when I click 'Install'.
Has anyone had success with the same setup?
EDIT: Error image:
It seems, from the capture, that your trying to instal version:
numpy-unoptimized-1.6.2.win32-py3.3.exe
However, I just checked the site this morning, and the latest available version is:
numpy-unoptimized-1.6.2.win32-py3.2.exe
Have you tried the installer again lately (using the latest build)?