Python execution timer to be used over `with` statement.

gistfile1.py

import datetime as datetime_module
import time
class Timer:
    def __init__(self, label=None):
        self.label = '%s : ' % (label or 'no label provided')
        return
    def __enter__(self):
        self.start = datetime_module.datetime.utcnow()
        self.start_cpu = time.clock()
        return self
    def __exit__(self, *args):
        end_cpu = time.clock()
        end = datetime_module.datetime.utcnow()
        print (self.label or '') + "CPU time is %s seconds" % (end_cpu - self.start_cpu)
        print (self.label or '') + "Elapsed time is %s seconds" % (end - self.start).total_seconds()