from time import time

class DeltaProfiler:
    """
    This is a Python specific ProfileTimer.cxx.
    It's not related directly to the ProfileTimer code, it just
    shares some concepts.
    """
    def __init__(self, name=""):
        self.name=name
        self.priorLabel = ""
        self.priorTime = 0
        self.active=0

    def printDeltaTime(self, label):
        if self.active:
            deltaTime=time()-self.priorTime
            print "%s DeltaTime %-25s to %-25s: %3.5f"%(
                self.name,
                self.priorLabel,
                label,
                deltaTime)
            self.priorLabel=label
            # The printing time is not included in the timing.
            # This is intentional.
            self.priorTime=time()