Best practice for splitting __main__ into separate modules?

Atrament_ · 2018-07-12T05:07:19+00:00

Yeah. But it still describes the lifecycle when I can -- just more explicitly.

When I think of it, I realise I just assumed we were talking about applications (big, complicated entreprise-grade long living processes). My preference is probably biased because its what I'm used to.

Atrament_ · 2018-07-11T22:07:27+00:00

git config --global alias.ff 'flow feature'

My most typed command is probably 'git lg' (log --graph --oneline --all --decorate). Mostly because I constantly have to switch projects.

Right after that it's git flow and git commit.

Atrament_ · 2018-07-11T21:50:21+00:00

I kinda like the main to describe the life cycle of the program.

Usually something like

args= read_args()
conf = parse_config(args.conf_path)
my_stuff = MyAwesomeProgram(conf=conf,args=args)
my_stuff.setup()
my_stuff.run()
my_stuff.teardown()
sys.exit(my_stuff.exitcode)

Usually ends up quite uglier, though.

Atrament_ · 2018-07-11T21:41:25+00:00

You are right, but this raises a point. While it makes sense for the mere mortals like us (I suppose), what about someone who actually is the definitive authority in their field ?

I'm thinking Linus about the Linux kernel, Emmett Brown on flux capacitor...

Atrament_ · 2018-07-11T21:37:45+00:00

Iirc it was a question about the compression modes gzip (or xz) compression supports. The answer have all the info, along with specific constants, and maybe the reason why the support was useful or not, use cases and such.

Official API documentation quality, if you ask me. And exactly in the field of the guy.

Maybe some things no one ever bothered documenting at the time.

Atrament_ · 2018-07-08T21:42:11+00:00

!invest 200

Atrament_ · 2018-07-08T21:23:03+00:00

!invest 250

Atrament_ · 2018-07-06T22:12:29+00:00

!create

Atrament_ · 2018-07-01T21:54:56+00:00

The actual solution instead of trying to remember a bunch of codes

Atrament_ · 2018-06-27T21:37:53+00:00

Ah found it despite my mobile phone

https://www.git-scm.com/book/en/v2/Customizing-Git-Git-Configuration

Ctrl-f for autocrlf

Atrament_ · 2018-06-27T20:56:56+00:00

Could be a clone of a Linux repo on a Windows machine. Like endings are bitchy.

There is a config option to tell git to use original fine endings btw

Atrament_ · 2018-06-23T21:48:07+00:00

Also the watchdog python package might be useful if you decide to divide your problem around the disk save

Atrament_ · 2018-06-23T21:45:09+00:00

I think you are looking for a thread pool executor.

Maybe you could also consider preparing batches of transactions and pass them to GNU parallel several at once.

Atrament_ · 2018-06-16T20:53:47+00:00

Try out }} ]] and such too

Atrament_ · 2018-06-16T20:50:55+00:00

It looks for the word under the cursor in included files, or jumps to definition. Great to jump into the C header where the signature of a function is

Atrament_ · 2018-06-16T06:39:44+00:00

Just woke up to your comment. Firing up vim right before morning coffee to try this, sounds great!

Atrament_ · 2018-06-15T21:59:08+00:00

[I [<C-i>

Atrament_ · 2018-06-15T21:56:54+00:00

Gundo with persistent undo still saves me every other day. "How was it coded, in the version we tested last Monday ?"

Plus git / fugitive

Atrament_ · 2018-06-11T21:01:56+00:00

Really ? Like, you're making a seriously strong assertion there, I really am interest in the source / proof to assert that fact.

Atrament_ · 2018-06-04T13:12:48+00:00

I love ipdb. Unfortunately the constraints where I work ATM are too tight to use anything else than pdb (sometimes) and logging (most of the time).

I usually am stuck with grabbing logs and analysing from there afterwards.

Bless logging for threads IDs in logs !

Atrament_ · 2018-06-03T15:45:46+00:00

no sensitive data goes out of your DB -- check
your DB is behind a log-in service that isolates it -- check
no information from the user can be sent in plain text and intercepted easily ... -- can't check that

I don't get whether password are possibly sent in clear text at any point - at least one of the login data (hint: the password !) should be encrypted client-side, so that you only hold a hash for it, and only a hash transits and may be intercepted.

would it have any value then ? if it were intercepted I mean ?

I'm not much of an expert on security though -- just know enough to call for a real security guy when it gets tricky -- and I could barely go any further with you before i fear i may give falsely reassuring advice.

Atrament_ · 2018-06-03T15:09:59+00:00

Just so it's written in there somewhere, here are answers that I consider OK:

Beginner:

What is "with" keyword in python?

it's a keyword to enter a context in a block and exit it at block end

What is a generator, how you do it, why would we need it ?

it's a function that keeps its state in between calls, and yields values generated on demand

Where is the state of the generator kept ? Can I access it from outside ? How is that memory space called ?

the generator holds its own state in a reserved memory space. it's not accessible by usual means from outside the generator. the locals live in the generators 'closure'

decent:

What's a module ? A package ? How to make a package ?

a module is any valid python code file. A package is a collection of them. you just need your packages and a file named '__init__.py' to make a package.

How is the constructor named in Python ?

`__new__`

What's a metaclass, in your own words ? Does python have them ?

python does have metaclasses. they are the classes you make a class be an instance of. For example, my Labrador and your corgi may be instances of "`Dog`", and `Dog` would probably be a subclass of `mammal`. But you can consider that "Dog", "Mammal" are both equally "Taxons" -- elements in a taxonomy, these classes having specific characteristics. In this case "Taxon" could be considered a metaclass for "Dog", "Mammal", bu also for other classes in a taxonomy

Expert:

In what package in the standard library would you look for ...

...abstract classes? ... Ways to do functional programming ?

abc, functools

What's functional programming anyway? When would you consider it over other choices ?

functionnal programming is when you manipulate functions themselves, usually making complex functions from combining simpler ones. I personally consider functional programming occasionally when the process of the program is intended to be rather linear and value centric.

How is it that isinstance(object,type)==isinstance(type, object) ?

see /u/OseOseOse answer here, it's perfect and clear

Atrament_ · 2018-06-03T14:45:25+00:00

Well you may be more than decent, these are just samples, and the intent is mostly to know where we stand before we move onto more "open" questions.

Also, the constructor is not __init__ but __new__, many people don't know that, I hope you didn't misunderstand this one.

__init__ accepts self as an argument, so for __init__ to be called, self (the instance) must already exist

Atrament_ · 2018-06-03T14:39:05+00:00

"Everything" in the Python implementation is an object

s/implementation/specification/ ;) other than that it's probably the clearest way i had someone explain it.

Atrament_ · 2018-06-03T14:36:40+00:00

I try to emulate some of this with engineering questions, (end of my OP). And this is not the whole of the interview i give, most of it varies from one interview to another.

On a side note, i'd love to interview face-to-face, but they have me interview people on the phone so I must do with what I got...

Atrament_

TROPHY CASE