I want to be able to call this script with a single id, a list of ids, a url, or a csv file.

Is there a simple way to express it? Here I’ve only added options to call the script with nothing, a single id or a list of ids. But it already looks too messy for my taste.

def parse_args():
        if len(sys.argv) == 3:
            # List
            if sys.argv[2].startswith("[") and sys.argv[2].endswith("]"):
                work_ids = sys.argv[2].strip("[").strip("]").split(",")
            else: # single work_id
        elif len(sys.argv) != 3:
    except Exception:
Arthur Besse

i highly recommend using click for all of your argument parsing needs.

click makes it easy to build very nice commandline interfaces.

You can install it on debian/ubuntu with apt install python3-click and it is also packaged in many other distributions, making it a very reasonable dependency to add to any program. Aside from that missing piece of information (and a silly recommendation to install it via pip), its quickstart is good and the place to start.

you have a really simple use-case, so you probably don’t need and argument parsing lib, which I would normally recommend…

You can just iterate through the arguments array and categorize them by type, then add them to the appropriate collection to be handled later.

Something like this:

ids = []
urls = []
csvs = []
for arg in sys.argv:
  if arg.startswith('http'):
  else if arg.endswith('.csv'):
Arthur Besse

That approach would work if you replace push with append (there is no push method on Python lists) but even for a simple use case, if you’re writing a program for other people to use it is nicer to use an argument parsing library like click to get input validation, useful error messages (eg telling you when a file argument is non existent, or permission denied, etc), and generate output for --help etc.

nice catch!
I constantly switch between Js and python, and cant remember the differences lol
yeah, the --help generation is a very convenient part of the libs.
I just wrote this to demonstrate the simplest possible answer.

You can solve your problem with another problem. ;)

programming in a nutshell


I’d use regex myself, but I doubt it would make the code much cleaner, maybe slightly shorter…

This is exactly what I was getting at. It would actually be a lot cleaner, because capture; pull them all out to a list and iterate (or just shove it where it needs to go). If it’s empty it’ll fix itself shortly.

Ask specific questions about how to code something in python

Python docs (tutorial)
Intro to programming - University of Helsinki

General python discussion on lemmy.ml

Create Post From:

  • 0 users online
  • 1 user / day
  • 1 user / week
  • 5 users / month
  • 7 users / 6 months
  • 22 subscribers
  • 13 Posts
  • Modlog