How to import cv2 in python3?
Python 3.xOpencvNumpyPython 3.x Problem Overview
I'm using Windows, and I'm trying to install package cv2 for python3.
I did a pip3 install opencv-python and it reports successful:
But when I do the import cv2 from python3, it's not found and I get weird errors:
What am I doing wrong?
Python 3.x Solutions
Solution 1 - Python 3.x
Your screenshot shows you doing a pip install from the python terminal which is wrong. Do that outside the python terminal. Also the package I believe you want is:
pip install opencv-python
Since you're running on Windows, I might look at the official install manual: https://breakthrough.github.io/Installing-OpenCV
opencv2 is ONLY compatible with Python3 if you do so by compiling the source code. See the section under opencv supported python versions: https://pypi.org/project/opencv-python
Solution 2 - Python 3.x
Make a virtual enviroment using python3
virtualenv env_name --python="python3"
and run the following command
pip3 install opencv-python
Solution 3 - Python 3.x
There is a problem with pylint, which I do not completely understood yet.
You can just import OpenCV with:
from cv2 import cv2
Solution 4 - Python 3.x
Please check your python version. Mine is 3.7.3 on a Mac macOS Catalina Version 10.15.7.
If you are using Jupyter notebook,
pip3 install opencv-python
is enough.
In your notebook menu click on Kernel and hit restart. Please see the image I included.
Kernel>Restart
Then run your code again. In my case that solved the problem.
Solution 5 - Python 3.x
anaconda prompt -->pip install opencv-python
Solution 6 - Python 3.x
well, there was 2 issues: 1.instead of pip, pip3 should be used. 2.its better to use virtual env. because i have had multiple python version installed
Solution 7 - Python 3.x
The best way is to create a virtual env. first and then do pip install , everything will work fine
Solution 8 - Python 3.x
Use '!' before the pip:
! pip install opencv-python