I’m after constantly reading images from an OpenCV camera in Python and reading from the main program the latest image. This is needed because of problematic HW. After messing around with threads and getting a very low efficiency (duh!), I’d like to switch to multiprocessing. Here’s the thre…
Tag: python
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How can I keep all objects updated in this OOP example?
I don’t know exactly how to explain it, but I’ll try my best. Here is a simple OOP example where you create players to kill a dragon. The point is to assign to each player a specific amount of damage to inflict on a dragon, in order to kill it. For instance, if a dragon has 200 health and 2
Commenting print() breaks the Python code
I was faced with a very strange problem. With print() this code works. If I comment or delete the 10-th line with print() I got an error: Process finished with exit code 1 I use Python 3.9. PyCharm. I tried to launch with different virtual environments with Python 3.8 and 3.10 – the same error. When I launch …
Python Tkinter –AttributeError
Cannot seem to figure out the below Tkinter message. Usually doing a quick search will provide answers but this time I seem to miffed the search engines as to what might be causing the below error. Curious to know if I am missing a Python package or line 25 below is used in an older version of Python and it
Why does Keras run only 5 epochs out of 25?
I have uninstalled Keras and Tensorflow and installed them both using But even after, I still have this strange thing that it’s only 5 epochs that are running: I cannot track when this situation occurred, but it used to run all of the epochs. Here is my code: I also use Please direct me. Answer Try repl…
“Update” _id in mongodb document
PS: I only have to do this due to business requirements I’m able to achieve it using mongosh, but since there are multiple records to be updated, I’m trying to implement a simple python script to automate the task. Is it possible to do this with pymongodb? I’m not able to set the new Id in t…
Plot don’t refresh when slider updated matplotlib
I can’t figure out why the plot don’t refresh when the slider is updated. I’m using Jupiter notebook and I choose the backend with ‘nbAgg’ parameter. Initialization code : There is a animation which lunch this function : The animation : Here the slider which stuck me : This below…
Double assignment of same variable in one expression in Python – does it have any purpose?
I was going through delta lake documentation page. There is a line like this : In the last line, we see a double assignment of same variable (spark). Does this do something different compared to : In general, in python, is there a meaning to double assignment of same variable ? Answer Short answer: It’s…
OpenCV finding number of rectangles and writing to video
I have a code that detects cars using haar cascade car model, draws rectangles around the detected cars, and generates a video file. I am trying to update the code to show the number of detected cars in each frame. When I execute this, some frames have numbers overlaid on each other. I want only one count wri…