Re: Python, equivalent of set command

2006-03-27 Thread Jeffrey Schwab 
loial wrote:
> In unix shell script I can do the following to get the status and
> values returned by a unix command
> 
> OUTPUT=`some unix command`
> STATUS=$?
> if [ $STATUS -ne 0 ]
> then
>   exit 1
> else
>   set $OUTPUT
>   VAL1=$1
>   VAL2=$2
>   VAL3=$3
> fi
> 
> How can I achieve the same in python?
> 
> I know how to run it via the os.system command and return the status,
> but how do I return the values too?

http://docs.python.org/lib/node241.html

6.8.3.1 Replacing /bin/sh shell backquote

output=`mycmd myarg`
==>
output = Popen(["mycmd", "myarg"], stdout=PIPE).communicate()[0]

The popen object also has a 'returncode' attribute.
-- 
http://mail.python.org/mailman/listinfo/python-list

Re: Python, equivalent of set command

2006-03-27 Thread skip 

loial> In unix shell script I can do the following to get the status and
loial> values returned by a unix command

loial> OUTPUT=`some unix command`
loial> STATUS=$?
loial> if [ $STATUS -ne 0 ]
loial> then
loial>   exit 1
loial> else
loial>   set $OUTPUT
loial>   VAL1=$1
loial>   VAL2=$2
loial>   VAL3=$3
loial> fi

loial> How can I achieve the same in python?

I'm not much of a shell programmer, but it looks like you want something
like:

import os
pipe = os.popen("some unix command")
result = pipe.read()
status = pipe.close()
if not status:  # but see below...
val1, val2, val3 = result.split()

Read up on the os.popen function to get the details of what's in the status
variable.  I think the exit status might be in the upper eight bits, but I
don't remember off the top of my head.  That will affect the test.

Skip
-- 
http://mail.python.org/mailman/listinfo/python-list

Python, equivalent of set command

2006-03-27 Thread loial 
In unix shell script I can do the following to get the status and
values returned by a unix command

OUTPUT=`some unix command`
STATUS=$?
if [ $STATUS -ne 0 ]
then
  exit 1
else
  set $OUTPUT
  VAL1=$1
  VAL2=$2
  VAL3=$3
fi

How can I achieve the same in python?

I know how to run it via the os.system command and return the status,
but how do I return the values too?

-- 
http://mail.python.org/mailman/listinfo/python-list