Re: Is this unpythonic?

From	"Frank Millman" <frank@chagford.com>
Subject	Re: Is this unpythonic?
Date	2015-05-08 15:12 +0200
References	<mailman.224.1431072121.12865.python-list@python.org> <554c8b0a$0$12992$c3e8da3$5496439d@news.astraweb.com> <mii4il$vv$1@ger.gmane.org> <554CA652.1000607@davea.name>
Newsgroups	comp.lang.python
Message-ID	<mailman.250.1431090908.12865.python-list@python.org> (permalink)

Show all headers | View raw

"Dave Angel" <davea@davea.name> wrote in message 
news:554CA652.1000607@davea.name...
> On 05/08/2015 06:53 AM, Frank Millman wrote:
>>
>
> It might be appropriate to define the list at top-level, as
>
> EMPTY_LIST=[]
>
> and in your default argument as
>     def x(y, z=EMPTY_LIST):
>
> and with the all-caps, you're thereby promising that nobody will modify 
> that list.
>
> (I'd tend to do the None trick, but I think this alternative would be 
> acceptable)
>

Thanks, Dave, I like that idea.

However, as you can see from my other replies, I have decided to go with the 
flow, and use the None trick.

Frank

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

Thread

Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-08 10:01 +0200
  Re: Is this unpythonic? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-08 20:08 +1000
    Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-08 12:53 +0200
      Re: Is this unpythonic? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-05-09 01:07 +1000
        Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-09 07:56 +0200
        Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-09 08:51 +0200
          Re: Is this unpythonic? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-05-09 19:47 +1200
            Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-09 11:10 +0200
    Re: Is this unpythonic? Dave Angel <davea@davea.name> - 2015-05-08 08:04 -0400
      Re: Is this unpythonic? Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-10 10:04 +0200
        Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-10 10:58 +0200
          Re: Is this unpythonic? Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-10 11:54 +0200
            Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-10 12:40 +0200
    Re: Is this unpythonic? "Frank Millman" <frank@chagford.com> - 2015-05-08 15:12 +0200

csiph-web