1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/examples/simple_map.py Fri Sep 14 23:16:24 2007 +0000
1.3 @@ -0,0 +1,44 @@
1.4 +#!/usr/bin/env python
1.5 +
1.6 +"""
1.7 +A simple example of serial computation using map-style processing.
1.8 +See the simple_pmap.py program for the corresponding parallel version.
1.9 +"""
1.10 +
1.11 +import time
1.12 +
1.13 +# Array size.
1.14 +
1.15 +N = 10
1.16 +delay = 1
1.17 +
1.18 +# Work function.
1.19 +
1.20 +def calculate(t):
1.21 +
1.22 + "A supposedly time-consuming calculation on 't'."
1.23 +
1.24 + i, j = t
1.25 + time.sleep(delay)
1.26 + return i * N + j
1.27 +
1.28 +# Main program.
1.29 +
1.30 +if __name__ == "__main__":
1.31 +
1.32 + t = time.time()
1.33 +
1.34 + sequence = []
1.35 + for i in range(0, N):
1.36 + for j in range(0, N):
1.37 + sequence.append((i, j))
1.38 +
1.39 + results = map(calculate, sequence)
1.40 +
1.41 + print "Time taken:", time.time() - t
1.42 + for i in range(0, N):
1.43 + for result in results[i*N:i*N+N]:
1.44 + print result,
1.45 + print
1.46 +
1.47 +# vim: tabstop=4 expandtab shiftwidth=4