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# ch10/example1.py

import time

def count_down(name, delay):

indents = (ord(name) - ord('A')) * '\t'

n = 3

while n:

time.sleep(delay)

duration = time.perf_counter() - start

print('-' * 40)

print('%.4f \t%s%s = %i' % (duration, indents, name, n))

n -= 1

start = time.perf_counter()

count_down('A', 1)

count_down('B', 0.8)

count_down('C', 0.5)

print('-' * 40)

print('Done.')