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#!/usr/bin/env python
"""
A simple example of sequential computation using a function, appending results
to a list/array.
"""
import time
#import random
# Array size.
N = 10
delay = 1
# Work function.
def calculate(i, j):
"""
A supposedly time-consuming calculation on 'i' and 'j'.
"""
#time.sleep(delay * random.random())
time.sleep(delay)
return i * N + j
# Main program.
if __name__ == "__main__":
t = time.time()
# Initialise an array.
results = []
# Perform the work.
print "Calculating..."
for i in range(0, N):
for j in range(0, N):
results.append(calculate(i, j))
# Show the results.
for i in range(0, N):
for result in results[i*N:i*N+N]:
print result,
print
print "Time taken:", time.time() - t
# vim: tabstop=4 expandtab shiftwidth=4
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