task_imtrans.py

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##########################################################################
# task_imtrans.py
#
# Copyright (C) 2008, 2009
# Associated Universities, Inc. Washington DC, USA.
#
# This script is free software; you can redistribute it and/or modify it
# under the terms of the GNU Library General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
# License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
#
# Correspondence concerning AIPS++ should be adressed as follows:
#        Internet email: aips2-request@nrao.edu.
#        Postal address: AIPS++ Project Office
#                        National Radio Astronomy Observatory
#                        520 Edgemont Road
#                        Charlottesville, VA 22903-2475 USA
#
# <author>
# Dave Mehringer
# </author>
#
# <summary>
# Task to transpose an image
# </summary>
#
# <reviewed reviwer="" date="" tests="" demos="">
# </reviewed>
#
# <prerequisite>
# <ul>
#
# </ul>
# </prerequisite>
#
# <etymology>
# imtrans => im(age) trans(pose)
# </etymology>
#
# <synopsis>
# imtrans transposes an image. It is built on top of ia.reorder()
# </synopsis> 
#
# <example>
# imtrans(imagename="myim.im", outfile="transposed.im", order="102")
#
# </example>
#
# <motivation>
# To make users happy, cf https://bugs.aoc.nrao.edu/browse/CAS-607
# </motivation>
#

###########################################################################
from taskinit import *

def imtrans(imagename=None, outfile=None, order=None, wantreturn=None):
    casalog.origin('imtrans')
    myia = iatool()
    newim = None
    try:
        if (not myia.open(imagename)):
            raise Exception, "Cannot create image analysis tool using " + imagename
        newim = myia.transpose(outfile=outfile, order=order)
        myia.done()
        if wantreturn:
            return newim
        else:
            newim.done()
    except Exception, instance:
        casalog.post( str( '*** Error ***') + str(instance), 'SEVERE')
        if myia:
            myia.done()
        if newim:
            newim.done()
        raise instance