To judge from the file paths, it looks like you’re running Python 3.7. If so, you’re getting caught by new-in-3.7 behavior: PEP 479 is enabled for all code in Python 3.7, meaning that StopIteration exceptions raised directly or indirectly in coroutines and generators are transformed into RuntimeError exceptions. (Contributed by Yury Selivanov in bpo-32670.) Before … Read more
The fix for this bug exists: pull request 395: Compilation correct .pyc files for Python 3.7.0. You can apply it by hand to your existing installation.
The way dataclasses combines attributes prevents you from being able to use attributes with defaults in a base class and then use attributes without a default (positional attributes) in a subclass. That’s because the attributes are combined by starting from the bottom of the MRO, and building up an ordered list of the attributes in … Read more
Installing NumPy on Windows is a common problem if you don’t have the right build setup. Instead, I always go to Christoph Gohlke’s website to download the wheels you can install for your computer. Christoph generously builds the libraries himself with the right build environment and he posts it on his website. Newer Instructions – … Read more
Data classes are just regular classes that are geared towards storing state, rather than containing a lot of logic. Every time you create a class that mostly consists of attributes, you make a data class. What the dataclasses module does is to make it easier to create data classes. It takes care of a lot … Read more
You aren’t seeing anything special because there’s nothing much asynchronous work in your code. However, the main difference is that time.sleep(5) is blocking, and asyncio.sleep(5) is non-blocking. When time.sleep(5) is called, it will block the entire execution of the script and it will be put on hold, just frozen, doing nothing. But when you call … Read more
I’m in Python 3.8.5. It sounds too simple to be real, but I had this same issue and all I did was reinstall numpy. Gone. pip install –upgrade numpy or pip uninstall numpy pip install numpy