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#!/usr/bin/env python
# BSD Licence
# Copyright (c) 2011, Science & Technology Facilities Council (STFC)
# All rights reserved.
#
# See the LICENSE file in the source distribution of this software for
# the full license text.
Randomly sample a CMIP listing file
Usage: sample_listing.py n <listing.txt
"""
import sys, random
def main():
n = int(sys.argv[1])
fns = []
for line in sys.stdin:
fn, size = line.strip().split()
fns.append(fn)
s = random.sample(fns, n)
for fn in s:
print fn
if __name__ == '__main__':
main()
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