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annotate lemuriformes/port.py @ 17:4793f99b73e0

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[lemuriformes] utility functions
author Jeff Hammel <k0scist@gmail.com>
date Sun, 10 Dec 2017 17:42:52 -0800
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1 #!/usr/bin/env python
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2
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3 import argparse
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4 import socket
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5 import sys
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8 def get_free_port():
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9 """get a free port on localhost"""
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10
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11 s = socket.socket(socket.AF_INET, type=socket.SOCK_STREAM)
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12 s.bind(('localhost', 0))
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13 address, port = s.getsockname()
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14 s.close()
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15 return port
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18 def main(args=sys.argv[1:]):
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19 """CLI to get a free port on localhost"""
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20
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21 # parse command line
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22 parser = argparse.ArgumentParser(description=get_free_port.__doc__)
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23 options = parser.parse_args()
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25 # print an open port
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26 print (get_free_port())
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29 if __name__ == '__main__':
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30 main()