'ERROR: Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly

I was trying to install OpenCV4 in a docker on jetson nano. It has jetpack 4.4 s os. The docker was successfully created and Tensorflow is running but while installing OpenCV using pip it is showing CMake error.

root@5abf405fb92d:~# pip3 install opencv-python
Collecting opencv-python
  Downloading opencv-python-4.4.0.42.tar.gz (88.9 MB)
     |████████████████████████████████| 88.9 MB 2.5 kB/s 
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Requirement already satisfied: numpy>=1.13.3 in /usr/local/lib/python3.6/dist-packages (from opencv-python) (1.18.4)
Building wheels for collected packages: opencv-python
  Building wheel for opencv-python (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 /usr/local/lib/python3.6/dist-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmpqpzwrofy
       cwd: /tmp/pip-install-93nxibky/opencv-python
  Complete output (9 lines):
    File "/tmp/pip-build-env-o_hualnr/overlay/lib/python3.6/site-packages/skbuild/setuptools_wrap.py", line 560, in setup
      cmkr = cmaker.CMaker(cmake_executable)
    File "/tmp/pip-build-env-o_hualnr/overlay/lib/python3.6/site-packages/skbuild/cmaker.py", line 95, in __init__
      self.cmake_version = get_cmake_version(self.cmake_executable)
    File "/tmp/pip-build-env-o_hualnr/overlay/lib/python3.6/site-packages/skbuild/cmaker.py", line 82, in get_cmake_version
      "Problem with the CMake installation, aborting build. CMake executable is %s" % cmake_executable)
  Traceback (most recent call last):
  
  Problem with the CMake installation, aborting build. CMake executable is cmake
  ----------------------------------------
  ERROR: Failed building wheel for opencv-python
Failed to build opencv-python
ERROR: Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly

Solution 1:^[1]

I had the same problem and i did this,

pip install --upgrade pip setuptools wheel

then install opencv again,

pip install opencv-python

this worked for me

Solution 2:^[2]

Yes .. Finally found a work around. Follow this https://github.com/mdegans/nano_build_opencv and build from source and finally gets installed.

PS: It may take a bit long for building, for me it took 10 Hrs :P.

Happy Image-Processing..

Solution 3:^[3]

If after

pip install --upgrade pip setuptools wheel

you still have the same error,

You can try to specify the older version of OpenCV to install.

Ex.

pip3 install opencv-python==3.4.13.47

Solution 4:^[4]

I had a similar problem and what solved it for me was not to use python:3-alpine but python:3.8-slim. E.g.:

FROM python:3.8-slim
WORKDIR /usr/src/app

RUN apt update
RUN apt -y install build-essential libwrap0-dev libssl-dev libc-ares-dev uuid-dev xsltproc
RUN apt-get update -qq \
    && apt-get install --no-install-recommends --yes \
        build-essential \
        gcc \
        python3-dev \
        mosquitto \
        mosquitto-clients


RUN pip3 install --upgrade pip setuptools wheel

RUN python3 -m pip install --no-cache-dir \
      numpy scipy matplotlib scikit-build opencv-contrib-python-headless \
      influxdb paho-mqtt configparser Pillow \
      qrcode

worked finally for me.

Solution 5:^[5]

please check your python specifications:


  - opencv -> python[
version='
>=2.7,<2.8.0a0
>=3.5,<3.6.0a0
>=3.6,<3.7.0a0
>=3.7,<3.8.0a0']

Solution 6:^[6]

I handled it by reinstalling python3 from scratch in my MacBook:

brew reinstall [email protected]

I also reinstalled numpy and matplotlib packages experimentally.

pip3 install numpy
pip3 install matplotlib 
pip3 install opencv-contrib-python

The versions:

macOS Mojave 10.14.5
Python 3.9.7
OpenCV 4.5.3

OpenCV's version is 4.5.3 by this way:

import cv2 
print(cv2.__version__)

But by "pip list", it shows "opencv-contrib-python 3.4.9.31".

Solution 7:^[7]

if you are trying to install opencv in your raspberrypi 3B, Use following steps:

sudo raspi-config
advanced -- expand filesystem
reboot your pi

Open your raspi terminal and do following stuff:

use command: sudo apt-get update
use command: sudo apt-get upgrade
check your python version and upgarde it to latest one
install pip and upgrade pip
use command: mkdir project
use command: cd project
create virtual environment
activate virtual environment
install dependencies ,can get dependencies from https://singleboardbytes.com/647/install-opencv-raspberry-pi-4.htm
if error in installing libdhf5-dev
use command: sudo apt-get install python3-h5py and reinstall libdhf5-dev
use command: pip install scikit-build
use command: pip install cython
before installing opencv ,make sure you are in virtual environment or activate environment
use command: pip install --no-cache-dir opencv-contrib-python==4.5.3.56
Remember to use mentioned version...

Thank You...

Solution 8:^[8]

I came across similiar situation
I had error

Failed to build opencv-python ERROR: Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly WARNING: You are using pip version 19.2.3, however version 22.0.4 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.

I ran in command prompt with admin privileges following
python -m pip install --upgrade pip
Now "pip install opencv-python" works

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Yohan_Dhananjaya
Solution 2	Kasi Viswanath
Solution 3	willSapgreen
Solution 4	deisting
Solution 5	???
Solution 6
Solution 7
Solution 8	user1371666

'ERROR: Could not build wheels for opencv-python which use PEP 517 and cannot be installed directly

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