Run IDL

from subprocess import Popen, PIPE

def run_idl(inp, do_log = False):
    """Run IDL"""
    
    if do_log:
        with open('idl.log', 'w') as log:
            idl = Popen(['nice','-n0','idl'],stdin = PIPE, \
                           stdout=log,stderr=log)
            idl.communicate(inp)
                           
    else:
        print '########### IDL ##################'
        idl = Popen(['nice','-n0','idl'],stdin = PIPE)
        idl.communicate(inp)
        print '######## Quitting IDL ############'