Python 3 Opencv 设置问题：“在 __init__.py 中找不到引用‘VideoCapture’” on Pycharm IDE

Question

I am trying to install OpenCv and run some code on PyCharm on Mac.

I have installed the opencv package as well as numpy but when I run the code this error shows up on Pycharm IDE: "cannot find reference 'VideoCapture' in __init__.py"

In fact, every time I write example_variable = cv2. , PyCharm is not giving me any option to autocomplete with a function attached to cv2. Why is this happening?

Here's the code I am trying to run. I tried also running other codes but the same error displays:

import cv2
import numpy as np

cap = cv2.VideoCapture()

while True:
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    cv2.imshow('frame',gray)

    if cv2.waitKey(1) & OxFF == ord('q'):
        break

cap.release
cv2.destroyAllWindows()

Any tips on how to run this code smoothly? The end goal is to have my front webcam capture live video and react to it.

Answer 1

Try one of this solutions:

1. Right-click on source Directory
2. Mark Directory as -> source root
3. File --> Invalidate Caches / Restart... -> Invalidate and Restart

OR:

1. In your IDE, go to settings -> preferences -> django
2. Ensure your Root directory, your settings.py and your manage.py are in the right place if you are in Django.

After all that, you can also delete the .idea folder in your root directory and restart the IDE.

Answer 2

而不是import cv2使用from cv2 import cv2

Answer 3

I agree with "from cv2 import cv2"

there have an another way to solve problems:

** Do Not Use Pip Install **

I try to use download opencv_python-4.5.5.62-cp36-abi3-win_amd64.whl file and then manual double click to install

wait a minute, Pycharm IDE successfully Show code completion.

---

by the way,can your code run?

if code can run, above will help you a bit.

and your path(project python) should be Englisgh ; not be Chinese or other language.

Answer 4

This worked for

1. Before I was using python from Anaconda, instead
2. Choose the default python interpreter

Answer 5

pip install --force-reinstall --no-cache -U opencv-python==4.5.5.62

1. use this command line to avoid the reference issue.

Answer 6

只需输入 from cv2 import cv2。