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#!/usr/bin/python3
import sys
import re
if __name__ == '__main__':
if len(sys.argv)>1:
port_range = sys.argv[1]
if re.search('[0-9]{1,5}-[0-9]{1,5}', port_range):
for tmp in port_range.split('-'):
if int(tmp) not in range(1, 65535):
print(f'Error: {port_range} is not a valid port range')
sys.exit(1)
else:
if int(port_range) not in range(1, 65535):
print(f'Error: {port_range} is not a valid port')
sys.exit(1)
else:
sys.exit(2)
sys.exit(0)
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