Source code for pydarn.proc.signal.signalCommon

def sigObjCheck(vtsig):
  """Determines if the called signal is a vt sig or a vt sigStruct object. 
  :returns sigobj: vt sigStruct object
  """
  if hasattr(vtsig,'data'):
    sigobj = vtsig
    vtsid = sigobj.parent
  else:
    sigobj = vtsig.active

  return sigobj


def prepForProc(vtsig):
  """Determines if the called signal is a vt sig or a vt sigStruct object. 
  If it is a vt sig object, the active vtsig.active sigStruct object is returned.
  The signal is truncated to its current valid time limits if necessary.
  This also sets the called sigStruct to be the active sigStruct.
  :returns sigobj: vt sigStruct object
  """
 
  sigobj = sigObjCheck(vtsig)

  #Remove times that are not valid.
  sigobj = sigobj.truncate()
  sigobj.setActive()

  return sigobj