task_clearcal.py

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import os
from taskinit import *
from parallel.parallel_task_helper import ParallelTaskHelper

def clearcal(vis=None,field=None,spw=None,intent=None, addmodel=None):

        casalog.origin('clearcal')

        # Do the trivial parallelization
        if ParallelTaskHelper.isParallelMS(vis):
                helper = ParallelTaskHelper('clearcal', locals())
                helper.go()
                return


        #Python script
        try:

                # we will initialize scr cols only if we don't create them
                doinit=False;

                if ((type(vis)==str) & (os.path.exists(vis))):
                        tb.open(vis)
                        doinit = (tb.colnames().count('CORRECTED_DATA')>0)
                        tb.close()

                        # We ignore selection if creating the scratch columns
                        if (not(doinit)):
                                casalog.post('Need to create scratch columns; ignoring selection.')

                        cb.open(vis, addmodel=addmodel)
                else:
                        raise Exception, 'Visibility data set not found - please verify the name'

                # If necessary (scr col not just created), initialize scr cols
                if doinit:
                        cb.selectvis(field=field,spw=spw,intent=intent)
                        cb.initcalset(1)
                cb.close()


                #write history
                ms.open(vis,nomodify=False)
                ms.writehistory(message='taskname = clearcal',origin='clearcal')
                if (doinit):
                        ms.writehistory(message='field       = "'+str(field)+'"',origin='clearcal')
                        ms.writehistory(message='spw         = "'+str(spw)+'"',origin='clearcal')
                        ms.writehistory(message='intent      = "'+str(intent)+'"',origin='clearcal')
                ms.writehistory(message='vis         = "'+str(vis)+'"',origin='clearcal')
                ms.close()

        except Exception, instance:
                print '*** Error ***',instance