refactor(udp_server): Convert script from Python 2 to 3 (espressif#9513)

Author: lucasssvaz

libraries/WiFi/examples/WiFiUDPClient/udp_server.py

@@ -6,17 +6,17 @@
 try :
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-except socket.error, msg :
- print 'Failed to create socket. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
+except socket.error as msg :
+ print('Failed to create socket. Error Code : ' + str(msg[0]) + ' Message ' + msg[1])
  sys.exit()
 
 try:
  s.bind(('', 3333))
-except socket.error , msg:
- print 'Bind failed. Error: ' + str(msg[0]) + ': ' + msg[1]
+except socket.error as msg:
+ print('Bind failed. Error: ' + str(msg[0]) + ': ' + msg[1])
  sys.exit()
 
-print 'Server listening'
+print('Server listening')
 
 while 1:
  d = s.recvfrom(1024)
@@ -25,6 +25,6 @@
  if not data: 
  break
 
- print data.strip()
+ print(data.strip())
 
 s.close()