Wrap a function

John Posner jjposner at optimum.net
Thu Jan 28 20:58:50 CET 2010

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")


More information about the Python-list mailing list