<s> __author__ = '<STR_LIT>' <EOL> import time <EOL> class Timer : <EOL> def __enter__ ( self ) : <EOL> self . start = time . clock ( ) <EOL> return self <EOL> def __exit__ ( self , * args ) : <EOL> self . end = time . clock ( ) <EOL> self . interval = self . end - self . start </s>
