While running a simple code on Open CV:
import cv2
import freenect
device = cv2.CV_CAP_OPENNI
capture = cv2.VideoCapture(device)
While running the above python code.I am getting following error:
Traceback (most recent call last):
File "hello.py", line 4, in <module>
device = cv2.CV_CAP_OPENNI
AttributeError: 'module' object has no attribute 'CV_CAP_OPENNI'
Please look into the code
I have already installed OPENNI.
Thanks in advance.
Try cv2.CAP_OPENNI instead of cv2.CV_CAP_OPENNI
To make it work properly, the installation should be proper and the method is as follows:
Make is using the proper repository. The link to the repository is:
https://github.com/jmendeth/PyOpenNI
You can directly use the code below to download and make
git clone https://github.com/jmendeth/PyOpenNI.git
mkdir PyOpenNI-build
cd PyOpenNI-build
cmake ../PyOpenNI
After installing, dont use "make install", instead copy the lib/openni.so found in the folder you have installed(PyOpenNI-build if you have used the above code to install).
Finally copy it your python install folder. In my case "/usr/lib/python2.7/dist-packages".
Testing
Test using the following python code:
import openni
Now the above code will also start running.
Related
I am a beginner to programming and so as I was following a tutorial I had to download opencv-python. So I followed all the steps and downloaded it.
opencv-python 4.3.0.38
That is what is displayed on my terminal(mac) when I check to see if opencv is installed or not using the command pip list | grep opencv
So I write a test code(on pycharm)
import cv2
print('Code Completed')
it works fine and prints out Code Completed, but when I run the same code on terminal(I am on the correct directory) using the command python Face_Detector.py it displays an error message saying
Traceback (most recent call last):
File "Face_Detector.py", line 1, in <module>
import cv2
ImportError: No module named cv2
How do I resolve this issue?
Any help would be greatly appreciated.
run this in the terminal where you work this will add the path and directory directly to the terminal you are using maybe it's happening because of the environment path
pip install opencv-python
I have a Colab notebook open and have my files cloned from a github repo. I want to run a python script called models.py. In this file, I am using pandas. When I run this line in Colab:
!python3 models.py
I get the following error:
Traceback (most recent call last):
File "models.py", line 1, in <module>
import pandas as pd
ModuleNotFoundError: No module named 'pandas'
However, if I run in a cell on Google Colab:
!pip3 list
I find that pandas is indeed installed:
pandas 0.25.3
My assumption is that when I run the script, it is not able to see the libraries I have installed but I am unsure how to fix this issue.
If I run:
!which python3
I get:
/usr/local/bin/python3
The python file I am trying to run is under:
/content/my_project/models.py
Should I instead take a different approach to running this file?
Instead of
!python3 models.py
You can use
%run models.py
In a clean Colab runtime, the location of python 3 is different than what you show in your question:
!which python3
# /usr/bin/python3
It looks like you are installing another Python instance in your VM. To ensure you're using Colab's bundled Python 3 executable, try using
!/usr/bin/python3 models.py
If you actually want to use the new python instance you've installed, you'll have to also install whatever packages you need. For example
!/usr/local/bin/python3 -m pip install pandas
I try to run a python script (test.py) containing this line only:
from paraview.simple import *
I want to use the last version of paraview. So, I downloaded it from the official webpage and I uncompressed the corresponding archive into a folder, say /home/paraview.
If I do not anything more than running the script with
python test.py
I get the following error message:
Traceback (most recent call last):
File "test.py", line 2, in <module>
from paraview.simple import *
ModuleNotFoundError: No module named 'paraview'
So, I set my PYTHONPATH like this:
export PYTHONPATH=/home/paraview/lib/python2.7/site-packages:$PYTHONPATH
Then, I rerun my script and I get a different error message:
Error: Could not import vtkCommonComputationalGeometry
Segmentation fault
I tried to set LD_LIBRARY_PATH:
export LD_LIBRARY_PATH=/home/paraview/lib
where vtkCommonComputationalGeometry.so is but it does not work.
Furthermore, if I try to locate vtkCommonComputationalGeometry, I find it in another location:
/usr/lib/x86_64-linux-gnu/libvtkCommonComputationalGeometry-6.2.so
I removed vtk with apt but it is still here.
Do you know how I could run my script?
Just use pvpython, that can be found in ParaView binaries.
path/to/ParaView/bin/pvpython test.py
try to install PVGeo package.
pip install PVGeo
So my case is a tricky one.
I first installed OpenCV2.4.8 and started it using for python2.7. Later I planned to migrate to OpenCV3.0.0. Both the times during installation I followed the official documentation procedure. Everything was working fine until I realized that OpenCV3 doesn't have SIFT() and SURF() modules. After a bit of searching I found they are present in opencv_contrib. First I tried to install that but for some reason I couldn't.
Later I found that these modules are present in OpenCV2.4.11 and planned to install that. Again following the official procedure I installed OpenCV2.4.11 got the same SIFT() importerror. Upon checking the OpenCV __version__ in python2 and python3 I found the following
python2: "2.4.8"
python3: "3.0.0"
For checking the version I used the following code:
from cv2 import __version__
print(__version__)
Unfortunately I don't have a lot of memory in /home, so I had deleted OpenCV2.4.8 and OpenCV3.0.0 build folders after installing. Therefore, I tried to manually remove OpenCV2.4.8 and OpenCV3.0.0 and deleted all opencv the libs from /usr/local/libs/ and sub-directories and all the opencv bins from /usr/local/bins/ (following answer in this question).
After removing all opencv files I again reinstalled OpenCV2.4.11 and tried to run my code. It failed at the import step in python2 giving
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: libopencv_core.so.2.4: cannot open shared object file: No such file or directory
in python3
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: libopencv_core.so.3.0: cannot open shared object file: No such file or directory
I again checked if OpenCV2.4.11 is present or not and its there but the python hasn't updated the previously stored link to opencv lib. I'm stuck at this error since 2 days with no solution. Any help will be appreciated.
EDIT:
Is there some shared library lookup file which python uses to store all the locations of shared libraries? If not how does this work (how python recognizes where to look for opencv as opencv is not listed in pip freeze)
EDIT2:
I found another mistake. I hadn't enabled -D BUILD_SHARED_LIBS=ON before. This time I kept it ON and rand sudo ldconfig after make and make install. Now I have a libopencv_core.so.2.4 in my /usr/local/lib/. It is a symlink to libopencv_core.so.2.4.11 present in the same folder. After ldconfig when I checked for python2 import cv2 didn't show any error but __version__ still shows '2.4.8'. I double checked for any OpenCV2.4.8 .so file and there are none. How is it still pointing to version '2.4.8'?
Steps for removal:
remove opencv libs by : sudo apt-get purge libopencv*
Verify that whether cv2 is uninstalled by trying import cv2 in python. It should show no cv2 module present
Install opencv2.4.11 by following this sh file
Run sudo ldconfig after sudo make install
Things should usually work but it didn't work in my case because cv2.so was missing from /usr/local/lib/python2.7/dist-packages/. For that manually copy from /<opencv-2.4.11 unzip locaiton>/release/lib/cv2.so to /usr/local/lib/python2.7/dist-packages/. Use sudo for permissions.
Now import cv2 will work and __version__ is '2.4.11'.
I am trying to configure svn hook for email notification using mailer.py script from apache, but it always crash on import of svn libs. I try two ways of installing svn and python. I try to install everything manually using command line and use CollableNet installer that have preinstalled Python and all libs I need but result is the same.
Now I try to import one library from hole package that I need using python in command line and I have such response:
>>> import svn.core
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named svn.core
I try to fix it using:
1) import sys; sys.path.append("C:\csvn\lib\svn-python\svn")
and
2) C:\csvn\lib\svn-python\svn>python "\__init__.py" install
But it didn't help.
For now I have no package with setup.py to install it.
I spend a lot of time on this task, and going crazy a little). Please give me any suggestion how to fix it.