Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #25819

Re: Converting a list of strings into a list of integers?

Show all headers | View raw

Tony the Tiger wrote:

> On Sun, 22 Jul 2012 11:39:30 -0400, Roy Smith wrote:
> 
>> To answer the question you asked, to convert a list of strings to a list
>> of ints, you want to do something like:
>> 
>>   MODUS_LIST = [int(i) for i in options.modus_list]
> 
> Thanks. I'll look into that. I now remember reading about the technique
> (in Mark Lutz' "Learning Python"), but it seems I'm getting old as I tend
> to forget about it from time to time. ;)
> 
>> But, to answer the question you didn't ask, if you're trying to parse
>> command-line arguments, you really want to use the argparse module. It's
>> a little complicated to learn, but it's well worth the effort.
> 
> Your suggestions about the argparse. Well, it seems it does pretty much
> the same as OptionParser which I use now. Perhaps it has more features
> (that I probably won't need in my 30 line script), I only need to keep
> track of maybe one or two options. Maybe one of these days, when I have
> little else to do, or when the OptionParser stops working, I'll give it a
> try. Thanks. :)

Here's an argparse example:

$ cat argparse_list.py
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("-m", "--modus", type=int, nargs="*")

print parser.parse_args().modus
$ python argparse_list.py 
None
$ python argparse_list.py -m
[]
$ python argparse_list.py -m 1
[1]
$ python argparse_list.py -m 1 2 3
[1, 2, 3]

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Converting a list of strings into a list of integers? Tony the Tiger <tony@tiger.invalid> - 2012-07-22 10:29 -0500
  Re: Converting a list of strings into a list of integers? Roy Smith <roy@panix.com> - 2012-07-22 11:39 -0400
    Re: Converting a list of strings into a list of integers? Tony the Tiger <tony@tiger.invalid> - 2012-07-22 11:01 -0500
      Re: Converting a list of strings into a list of integers? Peter Otten <__peter__@web.de> - 2012-07-22 18:30 +0200
  Re: Converting a list of strings into a list of integers? Alister <alister.ware@ntlworld.com> - 2012-07-22 15:39 +0000
    Re: Converting a list of strings into a list of integers? Tony the Tiger <tony@tiger.invalid> - 2012-07-22 11:01 -0500
    Re: Converting a list of strings into a list of integers? Jan Riechers <janpeterr@freenet.de> - 2012-07-22 19:20 +0300
      Re: Converting a list of strings into a list of integers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-07-22 17:01 +0000
        Re: Converting a list of strings into a list of integers? Jan Riechers <janpeterr@freenet.de> - 2012-07-22 20:27 +0300
      Re: Converting a list of strings into a list of integers? Grant Edwards <invalid@invalid.invalid> - 2012-07-23 14:27 +0000
        Re: Converting a list of strings into a list of integers? rusi <rustompmody@gmail.com> - 2012-07-23 08:31 -0700
    Re: Converting a list of strings into a list of integers? David Robinow <drobinow@gmail.com> - 2012-07-22 13:03 -0400
    Re: Converting a list of strings into a list of integers? Jan Riechers <janpeterr@freenet.de> - 2012-07-22 20:10 +0300
    Re: Converting a list of strings into a list of integers? Ian Kelly <ian.g.kelly@gmail.com> - 2012-07-22 11:16 -0600
  Re: Converting a list of strings into a list of integers? Paul Rubin <no.email@nospam.invalid> - 2012-07-22 10:03 -0700
  Re: Converting a list of strings into a list of integers? Dave Angel <d@davea.name> - 2012-07-22 21:03 -0400

csiph-web