casa6

import os

import re

import string

import time

import shutil

import numpy as np

​

from . import flaghelper as fh

from .update_spw import update_spwchan

from .parallel.parallel_data_helper import ParallelDataHelper

from .mstools import write_history

from casatasks import casalog

from casatools import quanta

from casatools import table as tbtool

from casatools import ms as mstool

from casatools import mstransformer as mttool

​

_qa = quanta( )

​

​

def split(vis, 

          outputvis, 

          keepmms,

          field,

          spw, 

          scan, 

          antenna, 

          correlation,

          timerange, 

          intent,

          array,

          uvrange,

          observation,

          feed,

          datacolumn, 

          keepflags,

          width, 

          timebin, 

          combine 

          ):

    """Create a visibility subset from an existing visibility set"""

​

    casalog.origin('split')

    # Initialize the helper class  

    pdh = ParallelDataHelper("split", locals()) 

    # Validate input and output parameters

    pdh.setupIO()

​

    # Input vis is an MMS

    if pdh.isMMSAndNotServer(vis) and keepmms:

        retval = pdh.validateInputParams()

        if not retval['status']:

            raise Exception('Unable to continue with MMS processing')

        pdh.setupCluster('split')

​

        # Execute the jobs

        pdh.go()

        return