The COMPLETE guide to Python properties

Properties are unbelievably useful in Python, and serve as a convenient shortcut to one of Python's most powerful concepts, and everyone's favourite thing, descriptors! (Don't worry, properties abstract all the complex stuff away.) We won't just be looking at what they do though, we'll be going into detail about how properties work, and why they're so powerful!

00:00 - Intro [1]
00:50 - Managing private attributes using getters, setters, and deleters [2]
05:04 - Computed properties
07:00 - Cached properties [3-4]
09:44 - How are properties implemented? [5-7]
14:58 - Outro

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#python #coding #howto

[TheJamesM]

Off the top of my head, one way to handle the issue you described with cached properties not responding to state change would be to handle the actual logic in a cached class method. The property would then pass the appropriate values to that method, meaning the call signature would change if any of the relevant attributes (or other variables) did. Of course, there would be some overhead to that, but I'm assuming the expensive stuff is things like disk reads, database queries, Internet requests, etc.

[jimshapedcoding]

Bro, I would be your first subscriber if I knew you're that kinda Coldplay fan to wear the Music of the Spheres tour t-shirt in a YouTube video lol, and great video :)

[johnmoff]

14:07 But why? Why change the method names to _

[CripsyFries]

so python's property is just this syntax in c#?

public class Test {
private int _age;

public int age {
get { return _age; }
set { _age = value; }
}

public Test(int age) {
_age = age;
}
}

Test test = new Test(42);
Console.WriteLine(test.age); // 42
test.age = 69;
Console.WriteLine(test.age); // 69