James Powell: So you want to be a Python expert? | PyData Seattle 2017

[@gustavom8726]

After almost 5 years, I keep coming back to this lecture for guidance. This is way better than any python course out there

[@NOCTUMSEMPRA]

His amount of knowledge, self-confidence and pedagogy explaining all kinds of concepts and scenarios is definitely worth of all my admiration as a developer. What a sublime guy he is.

[@sebastianpaez6132]

It is not crazy for me to say that the first 20 minutes of this talk taught me more than every programming class I had before I saw this for the first time ...

[@richienguyen2703]

I think this lecture is truly one of the kind because you rarely see any python videos talking about these very niche Python concepts. Plus, his style of presentation is great.

[@willd0g]

Same ; and im here to revisit his vim skills.

[@ihgnmah]

06:41 Data Model Protocol (Dunder Method) 20:50 Meta Class 47:22 Decorator 01:06:32 Generator 01:24:35 Context Manager 01:37:52 Summary 01:48:18 Q&A

[@dmitriyobidin6049]

If only every talk on every it conference was as interesting and useful as this one.

[@111skal111]

I can't believe how good this instructor is. This is a terrific live demo training course.

[@odanabunaga2505]

James Powell for the President of Python please!

[@ConsuelaPlaysRS]

For the `__init_subclass__` definition at 46:51, you can do something like class Base: def foo(self): return self.bar() def __init_subclass__(cls) -> None: try: bar = getattr(cls, 'bar') if not callable(bar): raise TypeError("bad user class: 'bar' must be a callable method") except AttributeError: raise TypeError("bad user class: 'bar' method not found")

[@omgwtfafterparty]

i think that currently to solve this kind of problems Id use ABC and abstractmethod decorator

[@umairgillani699]

This is one of the best live demo explanation of advance python concepts.. Really helpful stuff

[@Rashmi-bs09]

yes his talks are eye opener for me . I never Enjoyed a python like Truely entertaining and gem of knowledge here . Powerhouse I should say :) Thanks to @James Powell for keeping talks interesting and Curios it really keep our brains Busy and focused when you deliver talk like this .

[@SpencerMckenithWilliams]

references is the best here. I will always keep this as one of my best resources.

[@utkucanaytac5417]

the best explanation of decorators i ve ever seen

[@nikitasid4947]

Вот молодец, ничего не скажешь. Синтакс побоку, главное правильный взгляд на вещи.

[@hEmZoRz]

Clear and well-executed lecture with illuminating examples, but I was still left with one big question - which is, how the hell do we have an access to this kind of stuff, free of charge.

[@justtravelous9783]

great lecture and the approach to make the advanced topic so easy to understand.

[@metecantimur9542]

@19:35, I think we can implement the __call__ function to return the value of the polynomial for value x.

[@antonioarana8002]

Just what this incredible person says about the books in the beggining is exactly what all us feel like

[@kuyajj68]

Still the best advanced python talk.

[@tarik-xx-tarik2342]

What a great lecture

[@okdokie278]

Where can we find more excellent lectures like this one??

[@huanxu5140]

An update for Python 3.11 in 2022 would be awesome!

[@Michallote]

Nothing of that has changed really

[@bensilburn]

Great presentation! Advanced techniques but explained very clearly - that guy is good :)

[@pythongabi]

1:25:00 The equivalence of context manager metaphore in Java is try with resources I think, and to use an object with tey-with-resources it should implement either the AutoClosable or Closable interfaces.

[@iamprageethanjula]

I am a C++ dev, and seeing all the function details at runtime. WOW... I should move to python. LOL. Remember it has a cost associated with.

[@riicky_bobby]

What’s the cost?

[@Levy957]

@@riicky_bobby speed

[@meowsqueak]

With the interleaving generator at 1:24:00, what does the client code actually look like? How does the user of this kind of generator function return control back to it, after the yields in-between first/second and second/third? Is this where next() and send() get used? Is there an idiomatic way to write the client side of a coroutine without next/send?

[@Dipenparmar12]

Very good explanation

[@sinanabavi3812]

Actually, the code in 42:17 does not result in the desired behavior. Once we import Base in user.py, python finds no bar methods in the Base class and raises an error.

[@Alexander-dj1jp]

I solved it with: "if not "bar" in body and not "Base" in name:"

[@Alexander-dj1jp]

nvm he actually corrects it right after

[@ozlemelih]

JPow uses python?

[@amortalbeing]

very well presented. really liked it thanks.

[@arvindh4327]

11:50 what's the behaviour of ❗mark does to the string?

[@Pyroseza]

it's format syntax for conversion and tells the interpreter to format the string using the repr function, check here for more info: docs.python.org/3/library/string.html#format-string-syntax

[@meowsqueak]

The degree of those polynomials is actually 2 :)

[@nulencode7660]

He is obviously a Python expert but not a math expert.

[@shilinwang2958]

masterpiece

[@TankaNafaka]

all we need is generator, context manager and decorators 😊

[@sahasananth987]

In 9:15 How is he getting the comment to push the 2 as a superscript?

[@ВиталийКовалев-щ4е]

I think he used a custom digraph in vim

[@ZohanSyahFatomi]

first time i see, vim coding like this.

[@ArpitRawat]

@53:55 - THIS 🙌

[@jitendrak999]

Sir i want hanuman ji source code please give me

[@FAB199191]

ass time stamp 07:54

[@jamespaz4333]

I wish I could have that coding power :)

[@joelrodriguez1232]

Practice, practice, practice. That's what JPow would say.

[@prcmmd]

a was very usefule

[@merv893]

Has anyone ever noticed that a lot of the best programmers are fairly rubbish at typing.

[@z-f772]

7:54 muscle memory.

[@makeshiftsavant]

Reason why not to use vim - it took him 8:00 minutes to write the word "class"

[@AmrendraSanu]

I must say, your Python audience isn't very engaged.

[@anomad6314]

yeah... i'm not learning Python

[@germ4613]

What you meant to say is your not learning any coding or any programming language 🤣🤣🤣

[@anomad6314]

@@germ4613 may learn SQL... less programming, more database search... i think

[@germ4613]

@@anomad6314 the problem is what jobs get you sql? Think about it. That's data analyst and scientist. They have to learn sql and python and excel.

[@anomad6314]

@@germ4613 change management.... great if you know excel and SQL, but virtually none require python etc...

[@germ4613]

@@anomad6314 I'm looking at the list of all comptia certs and project+ seems like a business cert. I dont know how to describe it. Seems like a cert that can be used for many fields and companies. So why is it on a IT cert website?

[@this-is-bioman]

A 2h presentation about solving problems that didn't even have to exist if python was strongly typed

[@roar-with]

How strong typing would remove decorators, generators, overloading, etc? The only place it could do something - when he was talking about subclassing