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Re: Command line arguments [message #42535 is a reply to message #42534]

Fri, 11 February 2005 13:17

Michael Wallace
Messages: 409
Registered: December 2003

Senior Member

> I would like to compile the program once outside the loop and then pass
> the file using an argument instead grabbing the file from an environment
> variable. Can I do something like this?
>
> print IDL "mentor, $filepath\n";

Yes.

Maybe I don't understand what you're doing, but why are you 1.)
explicitly compiling the command your going to run instead of letting
IDL automatically compile it? and 2.) why don't you write a wrapper in
IDL itself that handles the looping and you just call the wrapper the
one time instead of calling the same IDL command multiple times?

My Perl is rusty, but a while back I wrote a Python wrapper to simulate
command line arguments. I think I posted it in the newsgroup some time
ago, but I couldn't find the old thread.

The first argument to the program below is the name of the IDL command
to execute. The remainder of the arguments will be fed to the IDL
command named in the first argument. I have defined my IDL programs
that need to be run on the command line to include the keyword ARGS.
The additional arguments are passed into the IDL command using this
keyword. By doing this, I can use this one wrapper for all command line
programs, but the argument list is not bound to something specific.

If I want to quickly do something and the program I want to run doesn't
have an ARGS keyword, I can just put the entire IDL command I want to
run in the first argument. Just quote the entire command so that it's
interpreted as a single argument.

-Mike

#!/usr/bin/env python

import os
import sys

# Usage statement
usage = "usage: %s idlprog args" %os.path.basename(sys.argv[0])

# Check that the name of the IDL program was provided
if len(sys.argv) < 2:
print usage
else:
fd = os.popen('idl', 'w')

# If extra arguments are given, pass them via the ARGS keyword
if len(sys.argv) < 3:
fd.write(sys.argv[1])
else:
fd.write(sys.argv[1] + ', ARGS = ' + `sys.argv[2:]`)

fd.close()

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[Message index]

		Re: Command line arguments By: David Fanning on Fri, 11 February 2005 18:42
		Re: Command line arguments By: Craig Markwardt on Fri, 11 February 2005 14:52
		Re: Command line arguments By: Mr. No Address on Fri, 11 February 2005 14:19
		Re: Command line arguments By: Mr. No Address on Fri, 11 February 2005 14:11
		Re: Command line arguments By: Mr. No Address on Fri, 11 February 2005 13:49
		Re: Command line arguments By: Michael Wallace on Fri, 11 February 2005 13:17
		Re: Command line arguments By: Craig Markwardt on Fri, 11 February 2005 12:46
		Re: Command line arguments By: Mr. No Address on Thu, 17 February 2005 08:23
		Re: Command line arguments By: JD Smith on Mon, 21 February 2005 09:56

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