I am trying to build the Python project openface, the project includes cv2 though I have a strong feeling this problem has nothing to do with openface and cv2 and more with me not understanding the Python development environment enough.
I am running on Mac OSX with El-Capitan, and am using Intellij but I have also tried PyCharm, which also comes from Jetbrains.
The issue is:
I have successfully compiled and installed cv2 on my machine and it is located at: /usr/local/lib/python2.7/site-packages/cv2.so
Meaning it is a shared object, but from my understanding it should still work.
I've added this so file to the Python SDK and installed it (at least I think I have).
This is a screenshot from Intellij:
And this is a screenshot from PyCharm:
And, yet, after I apply the changes:
import cv2
Is still not recognised in both Intellij and PyCharm.
How can I add this shared object to my Python project?
Many thanks in advance
Related
I cannot get autocomplete working for OpenCV (Python) on Windows.
According to Abid's instructions here, I pasted the cv2.pyd file in the C:\Python27\Lib\site-packages.
In the Python code, I import as follows:
import cv2.cv as cv
I have also installed numpy, and it created its own folder in site-packages unlike OpenCV (which I've pasted directly into site-packages).
With this setup, the code executes without any problems, even when OpenCV methods are called.
But I have not been able to get autocomplete to work. I have tried to get it to work on Sublime Text 2 (with SublimeCodeIntel) and PyCharm. In both IDEs, autocomplete works for the numpy import, but fails for the OpenCV import.
I'm using OpenCV 2.4.6, and Python 2.7 (32 bit).
Any possible solutions?
The reason it's not working is because you're using a .pyd file, which is essentially the same as a compiled .dll. Autocomplete works by reading the source .py files, which are plain text. Try installing the OpenCV and Intel Math Kernel Library optimized NumPy packages from Christoph Gohlke's Python Extension Packages for Windows repository, which is frequently updated and a must-use resource for anyone who does any kind of scientific Python computing on Windows. Make sure you delete the cv2.pyd and numpy directories from site-packages first. These new packages will install the .py source files needed by the autocomplete engine in Sublime Text.
EDIT
OK, so I wrote the above because it worked well for a bunch of other packages. I'm a Python 3 guy, and I never installed OpenCV from Gohlke because it only has Python 2 bindings. After reading #CrazyCoder's comment below, I booted up Win7, and indeed he's absolutely correct (and I should have realized this before) - since OpenCV is written in C/C++, the only .py file included in the Gohlke package is cv.py, whose entire contents are as follows:
from cv2.cv import *
The rest is contained in cv2.pyd and a bunch of .dlls. The full OpenCV Windows distribution from opencv.org is a 291 MB download, which expands to 3 GB, and the few .py files in there are involved in building OpenCV, and aren't any good for autocomplete purposes. So, unfortunately, I don't know if there's a solution to your problem at the moment. Just keep the docs handy, and perhaps check out OpenCV Computer Vision with Python from Packt/O'Reilly, published in April 2013.
I've had the same issue with PyCharm when building a custom version of OpenCV on windows. Here is what I did to fix it:
OpenCV made a folder in Python site-packages like so:
opencv site-packages
So what you need to do is just add the python-3.9 folder to your interpreter.
File
Settings...
Python interpreter
Three dots icon next to your interpreter -> Show all...
Select your interpreter and click on the "Show paths for selected interpreter" icon
Add the folder inside the cv2 site-packages
Now import the cv2 module normally.
The best way to solve all the problems of OPENCV-PYTHON is by uninstalling it and reinstalling it.
Even I faced the same problem.
I fixed it by:
python -m pip uninstall Opencv-python
Then I reinstalled it by using a lower version. But unfortunately, I did not know the versions of opencv; So by using a small trick you can get it by running:
python -m pip install opencv-python==
and you will get an error similar to this:
ERROR: Could not find a version that satisfies the requirement opencv-python== (from versions: 3.4.0.14, 3.4.10.37, 3.4.11.39, 3.4.11.41, 3.4.11.43, 3.4.11.45, 3.4.13.47, 3.4.15.55, 3.4.16.57, 3.4.16.59, 3.4.17.61, 3.4.17.63, 4.3.0.38, 4.4.0.40, 4.4.0.42, 4.4.0.44, 4.4.0.46, 4.5.1.48, 4.5.3.56, 4.5.4.58, 4.5.4.60, 4.5.5.62, 4.5.5.64) ERROR: No matching distribution found for opencv-python==
Here you can see all the versions of opencv-python; choose any one (but not the latest as the error occurs due the latest version of opencv-python. install it by using:
pip install opencv-python==3.4.17.61 (You can choose your version, but this version solved the issue for me)
then enjoy your coding....
Even AUTO-COMPLETE error in opencv-python gets solved.
HAPPY CODING
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 am new to Python so this may be a stupid question, sorry in advance if it is so!
The paths Python searches for modules using Spyder 4.1.4.:
[.., 'D:\Users\Martin\Anaconda3\lib\site-packages', ..]
The paths Python searches for when used via command line in windows:
[.., 'D:\Users\Martin\Anaconda3\lib\site-packages', ..]
Thus, both include path to
'D:\Users\Martin\Anaconda3\lib\site-packages'
where I store my cv2 module installed. Yet, Spyder can import cv2 and to my surprise cmd cannot import cv2 with an error No module named 'cv2'. What am I missing please? Can anyone verify if it works for him in command line please? (I changed/edited the question again to cut unneccessary long talk, though the essence stayed the same, in hope someone could answer).
I solved it. If you have a similar problem, you can check if your case is similar to mine and follow the steps.
I use Spyder and everything works fine. However my goal is to use Python via cmd. This could not be done because Python via cmd could not find my modules.
What I did: After typing python in cmd, Python worked and output its version by default. However, I noticed the version was different than version running in Spyder - I had two Python installations (one of which I didn't know about). I found the installation cmd uses by import sys and print(sys.executable). I uninstalled that Python installation.
Now, typing python in cmd does not do anything, it is an unknown command. Then I followed this guide to add my Python installation to Path (using Windows) by:
My Computer > Properties > Advanced System Settings > Environment Variables >
in System variables, I found "Path", clicked Edit, New, then input my Python installation path D:\Users\Martin\Anaconda3 as well as D:\Users\Martin\Anaconda3\Scripts and D:\Users\Martin\Anaconda3\Library\bin. This solved it for me.
I have compiled and installed OpenCV from source, and it works perfect, importing and using it in IDLE IDE or CMD working well.
But when using PyCharm to import OpenCV, there are no errors, but it is warning me that the function or OpenCV variables, can not find.
It is a screenshot from the PyCharm IDE:
There is a warning that imread() function not found.
In the IDE Settings, I did not find any way to configure the OpenCV, all settings seem OK, one more screenshot:
So this problem caused IDE does not autocomplete or suggest the parameters and so on...
But when running the program, it works well without any problem.
Note: When installing OpenCV with PyCharm IDE add packages, then it is OK. But I need to use the one which is compiled from source and installed locally.
Edit:
This the screenshot of IDLE IDE, which you can see the autocomplete works well.
List of packages:
In this list, there is no cv2, which the other packages in the dir are listed here
I had exactly this problem with OpenCV 4.2.0 compiled from sources, installed in my Conda environment and PyCharm 2020.1.
I solved this way:
Select project interpreter
Click on the settings button next to it and then clicking on the Show paths for selected interpreter
adding the directory containing the .so cv2 library (in my case in the Conda Python library path - e.g. miniconda3/lib/python3.7/site-packages/cv2/python-3.7). In general check the site-packages/cv2/python-X.X directory)
Being a complete begginer in python, I decided to install the python interpreter 3.4.4, and also PyDev plugin for eclipse IDE. I am also using windows 10.
I have encountered a problem regarding certain imports, namely : from PIL import Image, ImageTk, which is apparently an unresolved import.
I have looked at certain questions which were similar to my situation, but most of them gave a solution like installing packaged from the linux apt-get. Here are some topics I visited :
Uninstalling and reinstalling Pillow and pip,
Installing pillow-imaging-tk on Ubuntu,
This topic which left me very confused,
This one seemed helpful, but is on Unix OS again
So please, could someone explain to me why I am seeing this error, and how could I correct it if I absolutely want to use Eclipse, Pydev, windows 10 and Python 3.
Found the solution, here's what I did:
Set the PYTHONPATH like it is shown in this article, make sure python.exe is accessible via cmd,
Via cmd, type pip install pillow. Alternatively, you can enter the same command from Windows+R,
(Not sure if relevant step) Via eclipse, Windows->Preferences->PyDev->PythonInterpreterremove your interpreter to re-add it,
Restart eclipse.
For Python import problems in PyDev, the project web site has a page on interpreter configuration that is a good place to start. I recently had a similar problem that I solved by adding a module to the forced builtins tab.