Eela6 posted:

They used 'callable' as a synonym for in-place, so I assumed they meant 'mutable', given the example.

Thermopyle posted:

Yes, I know what you assumed, I'm pointing out that there's more than one way to read it so the poster doesn't get confused.

vikingstrike posted:

Anybody had any issues with PyCharm skipping over breakpoints when debugging? My Google searches have failed me, and it's getting super annoying because I can't figure out how to replicate the issues.

Slimchandi posted:

When I was learning Python basics, it took me a long time to realise that when using a list comprehension, you can use any name in the for part.

I saw examples of [letter.lower() for letter in name] and assumed you hadto use letter if you were iterating through a string.

I always try to avoid doing callable/in-place stuff in a list comprehension eg [print(letter) for letter in name]. Is there any particular reason to avoid this? It seems to be more concise than the indentation of a for-loop.

Slimchandi posted:

For clarity, I was referring to functions with side effects or return None rather than just callables. The given example was exactly what I intended.

It seems much more convenient than a for loop; is it just non-conventional or A Bad Thing?

Cingulate posted:

In this case,

code:

print(*name)

will do the same though.

Slimchandi posted:

For clarity, I was referring to functions with side effects or return None rather than just callables. The given example was exactly what I intended.

It seems much more convenient than a for loop; is it just non-conventional or A Bad Thing?

Dr Subterfuge posted:

map sounds like what you're talking about?

baka kaba posted:

consume(map(print, name)).

Cingulate posted:

baka is, in fact, literally talking about map:

NtotheTC posted:

I know a few of you guys run your python linux dev environments in vms due to being on windows machines out of preference or necessity...

Anyone have any experience with using Pycharm with docker / windows subsystem for Linux? My current place of work runs windows machines only but our app is switching over to docker containers on Linux and I'm looking for a way to develop on Linux without actually having to dual boot if possible.

NtotheTC posted:

I know a few of you guys run your python linux dev environments in vms due to being on windows machines out of preference or necessity...

Anyone have any experience with using Pycharm with docker / windows subsystem for Linux? My current place of work runs windows machines only but our app is switching over to docker containers on Linux and I'm looking for a way to develop on Linux without actually having to dual boot if possible.

sofokles posted:

unpacked robinhood posted:

If your dictionnary is declared like so :

Python code:

d={'akey':{'somekey':'value'}}

You can do

Python code:

d['akey']['somekey']

sofokles posted:

Noob stuff i guess:

If I have a nested dictionary and a bunch of strings with nested keys on the form

“[‘Dic1’][‘Dic1.2’][’innerkey’]”

How can I use the strings to get at the value at innerkey? In other words

Outerdic [‘Dic1’][‘Dic1.2’][’innerkey’]

Obviously

Outerdic “[‘Dic1’][‘Dic1.2’][’innerkey’]”
Is not it

Thermopyle posted:

Not sure I completely understand what you're asking here, but I think this is what you're looking for?

You have a dictionary:

Python code:

import operator
import re
from functools import reduce

the_dict = {
    'a': {
        'b': {
            'c': 'I want this value.'
        }
    }
}

the_string = "['a']['b']['c']"

key_map = re.findall("\w+", the_string)

def do_thing_with_dict(keys, the_dict):
    return reduce(operator.getitem, key_map, the_dict)

Using it:

Python code:

>>> do_thing_with_dict(key_map, the_dict)
'I want this value.'

sofokles posted:

Thats what im after

sofokles posted:

The re pattern wont work as there could be some weird symbols in some of the keys, but i can get the string to list by other means. But for the sake of interest, as Im no good at regex, what would a pattern be for capturing all instances in single quotes starting from left so that it would capture "'this',notthis'this'....notthis..'this', andnotthis" ?

Cingulate posted:

Why? Why did you want to do that?

Thermopyle posted:

Pulled from my collection of regexs that I thought might be useful at some point:

code:

([\"'])(?:(?=(\\?))\2.)*?\1

Rocko Bonaparte posted:

Is there a good article somewhere that goes through some of the idiosyncrasies of Popen? I'm sure anybody here that has used it many times in different circumstances have found little quirks based on things like the OS, how the application handles pipes, what happens with arguments, shell=True, etc.

I'm not talking "hurr look at the subprocess/psutil documentation hurr." I'm talking about contextual, system caveats that plague using Popen and friends for spawning and monitoring other processes and their output.

German Joey posted:

I'm a very long-time Python user, but most of my experience has been with the 2.x line. I've used a few versions of 3.x, but mostly kept my code to be compatible with 2.x. However! I now have a job-interview coming up at a place that uses 3.6.

I was able to pass this place's take-home coding interview just fine (or at least, fine enough to get a callback to the on-site, heh) but I'm worried about getting asked to whiteboard something related to some more recent 3.x feature that I'm less familiar with at the on-site interview. Which feature? Who knows, well not me, and that's what I'm worried about! Thus, my question: is there something I can read that has an overview of important 3.x features? Are there any important 3.x-only libraries I should know about? Thank you in advance for your advice, fellow goons.

Boris Galerkin posted:

I want to make multiple plots so that I can save and style them indivudually, and then I wanna be able to pass them into one master plot where I’d arrange them into some logical order, and then save that final one too. How would I do that?

Something like,

code:

# first figure
fig, ax1 = plt.subplots()
ax1.plot(...)
# style the plot
fig.savefig(...)

# repeat for ax2 and ax3

# this is the part I don’t understand
# define master_figure with a layout like this:
# ax1 ax1 ax1
# ax2 ax2 ax3
# ax2 ax2 ax3

master_figure.add_ax1_to_proper_layout_location()
# repeat for others

# each subplot would keep the sane colors, styles, limits as already defined
master_figure.savefig(...)

Just to be clear, each ax object should be saved as a full figure that takes up the whole page, and then when I pass it into master_figure it should just automatically resize and put it onto the proper grid location. Everything else wrt limits, markers, etc, should not change.

mr_package posted:

Using RQ what is the best way to create multiple workers? I'm not so familiar with systemd, is there a simple way to configure this? I kind of wish it was just built-in the way you can specify number of workers when launching gunicorn, for example.

This seems like it's probably the best of the simple options, that I can find; would you follow it? https://serverfault.com/questions/730239/start-n-processes-with-one-systemd-service-file/878398#878398