when uses time.clock,there are always mistakes

[石盼]

Hello !
　The problem like this:
　    		================================ RESTART: Shell ================================
　　>>> import time
　　>>> t = time.clock()
　　Traceback (most recent call last):
　  			File "<pyshell#5>", line 1, in <module>
　  			  t = time.clock()
　　AttributeError: module 'time' has no attribute 'clock'
　　>>>
　　Thanks!
　　Best wishes!