dataclass | Immutable value objects for JavaScript & TypeScript | Functional Programming library

Use collections.Counter.

As Chris_Rands alluded to in their comment, copy.copy has quite a bit of extra logic needed to handle arbitrary Python objects—this extra logic likely accounts for the difference in speed. In contrast, dataclasses.replace can get away with only making a few checks since the function only needs to work for dataclasses. You can see how much simpler dataclasses.replace is than copy.copy (and the functions it calls) in the source code for dataclasses.py and copy.py.

If you look at the source for copy.copy, you will notice that the code that copies an X object boils down to this.

Here: http://jsfiddle.net/BlackLabel/e9Lp3xvu/ I have reproduced the issue without Angular.

The problem is caused by the default value of tickPixelInterval for y-axis (72). As a solution you can reduce the value.

As per Dominik Ficek's comment

You are using Class itself Rather than instance!

The universal answer for performance questions is : measure then decide.

You ask two questions.

I would think so, but in a very negligeable way. Except if the computer running this code is very constrained, the difference would be barely noticeable (on the order of <1 second at startup time, and a few dozens of megabytes of RAM).

You can test it quickly by duplicating your sydsvenskan.py file 40 times, importing each of them in your scraper.py and running time python scraper.py before and after.

And in general, prefer doing simple things. Static imports are simpler than dynamic ones.

Simply put : yes. I tested to put it in a function and it worked fine :

Ok I understand what you're looking for. And sorry to say you're out of luck. At least as far as my knowledge of python goes. You can do it two ways.

1. Use importlib to search through a folder/package tha contains those files and imports them into a list or dict to be retrieved. However you said you wanted to avoid this but either way you would have to use importlib. And #2 is the reason why.

2. Use a Base class that when inherited it's __init__ call adds the Derived class to a list or object that stores it and you can retrieve it via a class object. However the issue here is that if you move your derived class into a new file, that code wont run until you import it. So you would still need to explicitly import the file or implicitly import it via importlib (dynamic import).

So you'll have to use importlib (dynamic import) either way.

The dataclass field and the property cannot have the same name. But you can add a leading underscore to the field, then the property will work.

Swift is telling you the exact problem. You are trying to assign a variable of type [String] to [SignUpViewModel.ErrorMessage]

Here is working code showing you a possible solution. Since you only have a list of strings, I chose to use Array.map