Error could not find a version that satisfies the requirement cv2 from versions none

I’ve been trying to install both OpenCV and cv2 from both Pycharm and from the terminal as suggested using:

pip install --user opencv
pip install --user cv2

but I’m getting the following error for them:

Collecting opencv
  Could not find a version that satisfies the requirement opencv (from versions: )
No matching distribution found for opencv

and

Collecting cv2
  Could not find a version that satisfies the requirement cv2 (from versions: )
No matching distribution found for cv2

How can I fix these and install the packages properly? I’m using python 3.4.

asked Jun 12, 2016 at 15:54

This the correct command that you need to install opencv

pip install opencv-python

if you get any error when you are trying to install the «opencv-python» package in pycharm, make sure that you have added your python path to ‘System Variables‘ section of Environment variables in Windows.
And also check whether you have configured a valid interpreter for your project

answered Apr 5, 2020 at 6:37

I ran into the same problem. One issue might be OpenCV is created for Python 2.7, not 3 (not all python 2.7 libraries will work in python 3 or greater). I also don’t believe you can download OpenCV directly through PyCharm’s package installer. I have found luck following the instructions: OpenCV Python. Specifically:

1. Downloading and installing OpenCV from SourceForge
2. Copying the cv2.pyd file from the download (opencvbuildpython2.7×64) into Python’s site-packages folder (something like: C:Python27Libsite-packages)
3. In PyCharm, open the python Console (Tools>Python Console) and type:import cv2, and assuming no errors print cv2.__version__

Alternatively, I have had luck using this package opencv-python, which you can straightforwardly install using pip with pip install opencv-python

Good luck!

answered Sep 3, 2016 at 15:31

Try this. I am using Jupyter notebook (OS: Ubuntu 16.04 LTS on Google Cloud Platform + on Windows). Executed following command in the Jupyter notebook to install opencv:

!pip install opencv-contrib-python    #working on both Windows and Ubuntu

After successful installation you will get following message:

Successfully installed opencv-contrib-python-4.1.0.25

Now restart the kernel and try to import opencv as:

import cv2

The same command can be used to installed opencv on Windows as well.

SOLUTION 2: try following commands to install opencv:
For Ubuntu:
Run following command from terminal:

sudo apt-get install libsm6 libxrender1 libfontconfig1

Restart Jupyter notebook kernel and execute following command:

!pip install opencv-contrib-python

NOTE: You can run all the above commands from the terminal as well without using ‘!’.

answered Jul 26, 2019 at 3:50

here is a tutorial that worked for me without any problem.

Copied from the site above the important part:

Download the OpenCV version corresponding to your Python installation
from here. In my case, I’ve used
opencv_python-3.1.0-cp35-cp35m-win32.whl.

Now, open a cmd window like before. You can open this directly in your
Downloads folder if you SHIFT and right click inside it. The idea is
to open a cmd window where you’ve downloaded the above […] file. Use
the […] command to install […] OpenCV:

1     pip install "opencv_python-3.1.0-cp35-cp35m-win32.whl"

Additional note: don’t forget to change the name of the downloaded file in the command you use.
Apparently by installing opencv, you’ll have access to cv2 too.

answered Dec 20, 2016 at 12:08

Installing opencv is not that direct.
You need to pre-install some packages first.

I would not recommend the unofficial package opencv-python. Does not work properly in macos and ubuntu (see this post). No idea about windows.

There are many webs explaining how to install opencv and all required packages.
For example this one.

The problem of trying to install opencv several times is that you need to uninstall completely before attempting again, or you might end having many errors.

answered May 12, 2019 at 11:12

How about try some different mirrors?
If you are in China, I highly recommend you try:

sudo pip install --index https://pypi.mirrors.ustc.edu.cn/simple/ opencv-contrib-python

If not, just replace the url address to some other mirrors you like!
Good luck.

answered Jul 24, 2019 at 6:04

First step:

pip uninstall numpy
pip uninstall opencv-python

Second step:

pip install numpy
pip install opencv-python

answered Feb 7, 2021 at 7:25

I had the same problem. Here are the steps for Windows 10 users.

Open CMD: win+r then type cmd. Now,

1. Type pip install virtualenv
2. Create a Virtual Environment, Type virtualenv testopencv
3. Get Inside testopencv, Type cd testopencv
4. Activate the Virtual Environment, Type .Scriptsactivate
5. Now Install Opencv, Type pip install opencv-contrib-python --upgrade
6. Let’s test Opencv, Type Python then import cv2 hit enter then type print(cv2.__version__) to check if its installed

Now, open a new cmd, win + r then type cmd, repeat step 6. If it gives you an error.

Go inside the testopencv folder, inside lib. Copy everything, go to your python directory, inside lib folder paste it and skip that are already present.

Again open a new cmd, repeat Step 6.

Hope it helps.

answered Jan 7, 2020 at 7:37

In jetso nano this work for me.

$ git clone https://github.com/JetsonHacksNano/buildOpenCV
$ cd buildOpenCV

answered May 8, 2020 at 15:18

First run from cmd

pip --version

to make sure that you have the updated version installed.

Then run

pip install opencv-python

answered Jun 29, 2021 at 5:13

Go through with this link: https://learnopencv.com/install-opencv-4-on-raspberry-pi/

you can install OpenCV perfectly with out any error. but the problem was it will take lot of time to install.

I had used pi3 model B+ with 32GB class10 SD card for me it took more than 12 hours for complete installation.

answered Jul 25, 2021 at 7:01

If you still find any error to install open-cv in your mac, try this:

opencv-python==4.2.0.34

This worked for me.

answered May 2, 2022 at 22:28