Wrap a function

Peter peter.milliken at gmail.com
Thu Jan 28 21:20:48 CET 2010


On Jan 29, 6:58 am, John Posner <jjpos... at optimum.net> wrote:
> On 1/28/2010 2:24 PM, Joan Miller wrote:
>
> > On 28 ene, 19:16, Josh Holland<j... at joshh.co.uk>  wrote:
> >> On 2010-01-28, Joan Miller<pelok... at gmail.com>  wrote:
>
> >>> I've to call to many functions with the format:
>
> >>>>>> run("cmd")
>
> >> Check the docs on os.system().
> > No. I've a function that uses subprocess to run commands on the same
> > shell and so substitute to bash scrips. But a script full of run
> > ("shell_command --with --arguments") is too verbose.
>
> I'm suspicious of your original intent. Essentially, you want to write
> code in which a literal string, such as ...
>
>    ls -l
>
> ... is *not* enclosed in quotes. Why run the risk of creating confusion
> (in other people who look at your code, in syntax-checking tools, etc.)
> between variables and literals?
>
> But I'm in sympathy with your desire to make the code as clean as
> possible and to minimize the number of times you have to type a quote
> character. My suggestions:
>
> 1. Create a function (say, "Run") that encapsulates as much of the
> syntax as possible: os.system(), subprocess.call(), string-splitting,
> whatever. So an invocation would look like this:
>
>    Run("ls -l *.txt")
>
> (I think you've already done this step.)
>
> 2. Find a text editor that supports keyboard macros, so that a single
> keystroke turns this text line:
>
>    ls -l *.txt
>
> ... into this one:
>
>    Run("ls -l *.txt")
>
> HTH,
> John

I can't see you avoiding quotes etc, but extending on John's comment,
the obvious next step would be to run everything in a loop i.e. place
all the commands into a list and create a loop that ran each command
in the list.

Almost all editors support macros - most editors support some form of
language sensitive editing (NOT the prompt call parameters style but
rather help with the syntax via a 'form' style of fill-in) that will
allow you to reduce typing effort. But macros would be the first and
easiest choice for this activity.

Peter



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