What is a namespace object?
The documentation for argparse.Namespace can be found here. You can access the s attribute by doing args.s. If you’d like to access this as a dictionary, you can do vars(args), which means you can also do vars(args)[‘s’]
python
Simple way to create matrix of random numbers
Take a look at numpy.random.rand: Docstring: rand(d0, d1, …, dn) Random values in a given shape. Create an array of the given shape and propagate it with random samples from a uniform distribution over [0, 1).
How to create a list of objects?
Storing a list of object instances is very simple
install csv package in pycharm
You can’t pip install csv because the csv module is included in the Python installation. You can directly use : in your program Thanks
Error: Could not find or load main class net.minecraft.launchwrapper.Launch when launching Minecraft 1.12.2 with Forge
Ok, actually, on Windows the classpath separator is ; not : Replacing separator fixes this issue
Rolling or sliding window iterator?
There’s one in an old version of the Python docs with itertools examples: The one from the docs is a little more succinct and uses itertools to greater effect I imagine. If your iterator is a simple list/tuple a simple way to slide through it with a specified window size would be: Output:
inverting image in Python with OpenCV
You almost did it. You were tricked by the fact that abs(imagem-255) will give a wrong result since your dtype is an unsigned integer. You have to do (255-imagem) in order to keep the integers unsigned: You can also invert the image using the bitwise_not function of OpenCV:
tkinter gui layout using frames and grid
I assumed that frames contain their own ‘grid space’ That is a correct assumption. You can just see one of the entry fields to the right of the green frame. Why is it going there ? The problem starts here: In python, x = y().z() will always set x to the result of .z(). In … Read more
ValueError: The channel sent is invalid on a Raspberry Pi – Controlling GPIO Pin 2 (BOARD) using Python causes Error
So I have a tiny little fan connected to pin 6(Ground) and pin 2. I am trying to manually start and stop the fan when needed but I am getting this error when trying: ValueError: The channel sent is invalid on a Raspberry Pi Here is my code that I am executing as root. It … Read more
ubuntu /usr/bin/env: python: No such file or directory
I update the kernel, after that the Ubuntu doesn’t work well, PS: I try to exec “meld” command, it will report that “/usr/bin/env: python: No such file or directory”, then I exec “sudo apt-get install python” and get the result “python is already the newest version.”, what should I do for it. I’m not good … Read more