sleep in Python

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examples/time/sleep.py

import time

start = time.time()
print("hello " + str(start))

time.sleep(3.5)

end = time.time()
print("world " + str(end))
print("Elapsed time:" + str(end-start))

hello 1475217162.472256
world 1475217165.973437
Elapsed time:3.501181125640869