I have a dedicated tutorial series on classes!! Go watch that

@@TechWithTim Thank you for replying

@@TechWithTim Tim, I don't see any reason for *_Meta_* to inherit from *_type._* I think it will work fine without that. Could you please clarify why you insisted that?

@@nirajraut9408 so it calls new and returns a class, otherwise it calls object.__new__() and then tries to instantiate with __init__. His example is bit too simple, in that it just wraps type to show functionality (which needs to be done), but in a real life use case, you may want to choose a class based on the inputs...and only type can do that. For instance, I have spacecraft telemetry in classes: Current, Voltage, Temperature, and I can tell which one I want by the filename. So I'll do something like: class Telemetry(type): klasses = dict(current=Current, voltage=Voltage, temperature=Temperature) def __new__(cls, name): return cls.klasses[name].fromfile(name) Here fromfile are a class method (constructor helpers) that reads the file (in a context manager), and instantiates the object with values. So in use, I just say: >>>telemetry = Telemetry(filename) and get the data unpacked according to protocol w/o having to worry about picking the right object to put it in. Then I just just say: >>>telemetry.plot() and a house keeping plot is generated, without the code explicitly worrying about what kind of telemetry I need to look at. Note that the whole thing is accomplished with ZERO if/then clauses, reducing cyclomatic complexity.

and how exactly do they earn money if the product is "free" - may it be that their ai learns to code from all the data and helps to make us programmers obsolete?

MaDsaiboT I believe it’s through the pro version and website ads

@@MadsaiboT Well compliers already write better machine code than us, so the AI just needs to convert the requests into a high-level language, someone could probably design and train a Neural network to do that.

@@MadsaiboT There's a paid version as well. And all the data is kept on your local machine, they used to keep everything on server but after a outrage in open source community they stopped storing data on their servers.

@@MadsaiboT it’s not free, u need to pay for it

I actually dont understand, maybe because i havenot code before.

Then why would you watch an expert tutorial?@@wongkingshun If you haven't coded before, I recommend watching introduction tutorials and beginnner tutorials, then making some beginner projects, then intermediate tutorials, and projects, and advanced tutorials and projects that combine EVERYTHING YOU"VE LEARNED THROUGHOUT YOUR ENTIRE LEARNING JOURNEY It might be useless but it helps to recall stuff.

Implementing singleton design pattern

type

Django and other ORMs

type really outclasses itself

Great! Was going to write such comment

Python is made in C so most features that are in C are going to be in Python as long as the Python devs had enough attention span to get to it.

Better than a lecture

@@atomgutan8064 lecture + 4

If you have more than a couple arguments, it is often more clear to use keyword arguments. Additionally, some methods can limit what arguments are positional only and what are keyword only. Python 3.8 now let's you force the latter.

You would do this with inheritance. You can either implement abstract classes or mixin-style classes to achieve what you want. Additionally, you can get really fun with class decorators to add/remove functionality at will. I'll be covering these later in my new series.

There are ways of doing this (as mentioned above), but personally I think Java is much more beautiful in that regard, because python code gets quite complex if you do that. On the other hand most classes look ugly in python, but using them is sooo beautiful, of they are written with the user in mind.

@@nmertsch8725 I'm the exact opposite, but to each their own!

There, normally, isn't any valid use case for Meta Classes when alternative techniques achieve the same goal meta classes set out to achieve. james Powell does a great talk on what you need to know to be an expert Python programmer, and the metaclasses argument comes up. A popular method is using inheritance coupled with the "__init_subclass__" magic method to control the flow down stream. There is an inverse option but the answer escapes me. Check out the video if you can, its amazing !

Started my journey with Python 8 months ago and I just finally understood MetaClasses thanks to this video

from my experience with every engineering subject (mechanical and electrical too) check out on advanced/expert topics so you could get some taste of what you will do in the future - try to solve it, If you do not understand any of it do not worry make your personal target to understand it. Such a method helps - so you will not get bored learning basics.

You haven't even watched it all

I think that is not dangerous. In old version of python when you create the class you were obligated to put object but now it is unnecessary.

Even I want to know why do some people write class Person(object) I didn't get it. If anybody can explain that will be of great help.

That is a holdover from python 2, where classes had to explicitly inherit from object or another class. In python 3 that is no longer needed. Feel free to create you own custom classes with class MyClass:

@@JakeCallahan Thank you for explaining

@@JakeCallahanin 2, new style classes had to sub object. Without that parameter, they were old style classes, which were sunset before I started python in 2002, but still existed in the language for backwards compatibility.

Yep you’re correct! He inspired me to teach it but a little bit slower than he does :)

@@TechWithTim cool, keep it up, I like yours more! 😁

Thanks ! That video made my day :)

As a guru, I think Tim’s approach is entirely the logical way to explain python.

Rtfm.

That is due to the print function, which prints whatever the called function returns. In this case, the called function has no return statement, thereby 'None' becoming the default return value.

That is why even experts lint.

r/comedycemetery

objects