PyCharm OpenCV- autocomplete with import cv2.cv2, no errors with import cv2

Question

I'm just getting started with PyCharm, python, and OpenCV, and I'm trying to set up my environment. I've installed all the necessary packages and I import OpenCV like so:

import cv2

However, this does not autocomplete and shows warnings that the method may be missing when called, BUT if I import like so:

import cv2.cv2

autocomplete does work, but running produces the following error:

Traceback (most recent call last):
  File "C:/Users/dunnj/PycharmProjects/TransformApps/transformapps/blackwhite.py", line 1, in <module>
    import cv2.cv2 as cv2
AttributeError: 'module' object has no attribute 'cv2'

Answer 1

Credit to ingolemo from r/learnpython. I was stuck on this for ages and it drove me mad so I'm here sharing.

My OpenCV was installed by using the wrapper opencv-python package

---

The sys.modules hacking that that module is doing is the source of the problem. Pycharm doesn't exactly import modules in order to know what's inside of them, so messing with the imports dynamically like that confuses pycharm greatly. It's not pycharm's fault, the opencv-python maintainer should have used a star import rather than that messy import hack. You should be able to work around the problem using the technique you stumbled upon. All you have to do is catch and ignore the error under normal operation:

import cv2

# this is just to unconfuse pycharm
try:
    from cv2 import cv2
except ImportError:
    pass

Answer 2

The proposed import solution did not work for me. I had exactly this problem with OpenCV 4.2.0 compiled from sources, installed in my Conda environment and PyCharm 2020.1.

I solved this way:

1. Select project interpreter
2. Click on the settings button next to it and then clicking on the Show paths for selected interpreter
3. added the directory containing the cv2 library (in my case in the Conda Python library path - e.g. miniconda3/lib/python3.7/site-packages/cv2/python-3.7). In general check the site-packages/cv2/python-X.X directory)

Answer 3

Installing Jedi solved this problem for me. You can use pip install jedi in terminal

You can find more info about jedi here: https://pypi.org/project/jedi/

Answer 4

I have tried a lot of solutions and finally got the best one.

I just installed "Kite" Plugin in PyCharm and it works flawlessly.

What I really love about it, that it works for any modules you import, and will also help you code faster.

Answer 5

My Configuration:

• PyCharm 2021.2.3 on macOS 11.6
• Python 3.9.7 running in a Virtual Environment(VE)
• opencv-python 4.5.4.58 installed into the VE via pip using the PyCharm Terminal window

Steps that worked for me to get autocompletion working:

tldr: Update python interpreter settings to point to <full path to venv>/lib/python3.9/site-packages/cv2

1. In preferences, Select Python Interpreter
2. Click the setting icon ( gear on right of box that display your Python Interpreter and select Show All
3. A list of all your configured Interpreters is show with your current interpreter already hi-lighted.
4. With your interpreter still highlighted, click the Icon that shows a folder and subfolder at the top. Tool tip should say "Show Paths for Selected Interpreter.
5. Click the + button and add the following path: <full path to the venv>/lib/python3.9/site-packages/cv2 The .../python3.9... will be different if you are using a different Python Version.
6. Click Ok until you are back to the main IDE window.

This has worked in three different Virtual environments for me so far. For two of those, I had to restart the IDE for the completions to show up. The remaining one did not require a restart and worked immediately.

Answer 6

just execute the following commands in your project working environment.

1. pip uninstall opencv-python
2. pip install opencv-python==4.5.4.60