On 7/31/19 11:57 AM, Gursimran Maken wrote: > Hi, > > Anyone could please let me know the difference between decorators and > inheritance in python. > > Both are required to add additional functionality to a method then why are > we having 2 separate things in python for doing same kind of work.
I started to write something here several times and never felt like I got it right. Let me try once more without fussing too much. Python's decorators feel like a "local" thing - I have some code, and I want to make some change to it. Most often this comes up in predefined scenarios - I enable one of my functions to be line-profiled by decorating with @profile. I turn an attribute into a getter by using @property. I decorate to time a function. I decorate to add caching (memoizing) capability (@functools.lru_cache). If doesn't _have_ to be local; if I wanted to wrap a function that is not in "my" code (e.g. from Python standard library, or some module that I've obtained from the internet) I can, although the convenience form using @decorator doesn't really apply here since I don't want to modify "foreign" code; I have to use the underlying form of writing a function that generates and returns a function which augments the original function (that sounds so messy when you try to write it in English!). Inheritance is a more systematic building of relationships between classes - I can accomplish some of that with decorators, but not all. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
