error in except
Rodrick Brown
rodrick.brown at gmail.com
Mon Feb 4 16:49:37 EST 2013
For the life of me I cant figure out why this exception is being thrown.
How could I use pdb to debug this?
$ python udp_local2.py server
File "udp_local2.py", line 36
except:
^
SyntaxError: invalid syntax
#!/usr/bin/env python
import random, socket, sys
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
MAX = 65535
PORT = 1060
if 2 <= len(sys.argv) <= 3 and sys.argv[1] == 'server':
interface = sys.argv[2] if len(sys.argv) > 2 else ''
s.bind((interface, PORT))
print 'Listening at', s.getsockname()
while True:
data, address = s.recvfrom(MAX)
if random.randint(0, 1):
print 'The client at', address, 'says:', repr(data)
s.sendto('Your data was %d bytes' % len(data), address)
else:
print 'Pretending to drop packet from', address
elif len(sys.argv) == 3 and sys.argv[1] == 'client':
hostname = sys.argv[2]
s.connect((hostname, PORT))
print 'Client socket name is', s.getsockname()
delay = 0.1
while True:
s.send('This is another message')
print 'Waiting up to', delay, 'seconds for a reply'
s.settimeout(delay)
try:
data = s.recv(MAX)
except socket.timeout:
delay *= 2
if delay > 2.0:
raise RuntimeError('I think the server is down')
except:
raise
else:
break
print 'The server says', repr(data)
else:
print >> sys.stderr, 'usage: %d server [<interfae>]' % sys.argv[0]
print >> sys.stderr, ' or: %d client <host>' % sys.argv[0]
sys.exit(2)
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