gistfile1.py

# Grab your time module !
import time

# Capture the time at the start of your program
time_at_start = time.time()

# The code you want to time goes here
for i in range(1,billion):
    foo()
    blah()
# End of code to be timed

# Capture the elapsed time between the start and now (the end of your program)
time_at_end = time.time() - time_at_start

# Print it ! Easy as pie !
print(time_at_end)
> 13.28290414810181