1 files changed, 39 insertions, 34 deletions
diff --git a/examples/v3arch/asyncore/oneliner/manager/cmdgen/get-v3-with-specific-engine-id.py b/examples/v3arch/asyncore/oneliner/manager/cmdgen/get-v3-with-specific-engine-id.py
index ca1d1fe..18b3a47 100644
--- a/examples/v3arch/asyncore/oneliner/manager/cmdgen/get-v3-with-specific-engine-id.py
+++ b/examples/v3arch/asyncore/oneliner/manager/cmdgen/get-v3-with-specific-engine-id.py
@@ -1,18 +1,23 @@
-#
-# Command Generator
-#
-# Send SNMP GET request using the following scenario and options:
-#
-# * try to communicate with a SNMPv3 Engine using:
-# ** a non-existing user
-# ** over IPv4/UDP
-# ** to an Agent at demo.snmplabs.com:161
-# * if remote SNMP Engine ID is discovered, send SNMP GET request:
-# ** with SNMPv3, user 'usr-md5-none', MD5 authentication, no privacy
-#    at discovered securityEngineId
-# ** to the same SNMP Engine ID
-# ** for an OID in text form
-#
+"""
+Discover SNMPv3 SecurityEngineId
+++++++++++++++++++++++++++++++++
+
+Send SNMP GET request using the following scenario and options:
+
+* try to communicate with a SNMPv3 Engine using:
+
+* a non-existing user
+* over IPv4/UDP
+* to an Agent at demo.snmplabs.com:161
+
+* if remote SNMP Engine ID is discovered, send SNMP GET request:
+
+* with SNMPv3, user 'usr-md5-none', MD5 authentication, no privacy
+   at discovered securityEngineId
+* to the same SNMP Engine ID
+* for an OID in text form
+
+"""#
 from pysnmp.entity.rfc3413.oneliner.cmdgen import *
 
 snmpEngine = SnmpEngine()
@@ -38,10 +43,10 @@ snmpEngine.observer.registerObserver(
 
 authData = UsmUserData('non-existing-user')
 
-for errorIndication, errorStatus, errorIndex, \
-        varBinds in getCmd(snmpEngine, authData,
-                           transportTarget, ContextData()):
-    break
+errorIndication, errorStatus, errorIndex, varBinds = next(
+    getCmd(snmpEngine, authData, transportTarget, ContextData(),
+           ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)))
+)
 
 # See if our SNMP engine received REPORT PDU containing securityEngineId
 
@@ -60,22 +65,22 @@ print('Remote securityEngineId = %s' % securityEngineId.prettyPrint())
 authData = UsmUserData('usr-md5-none', 'authkey1', 
                        securityEngineId=securityEngineId)
 
-for errorIndication, errorStatus, errorIndex, \
-        varBinds in getCmd(snmpEngine, authData, \
-                           transportTarget, ContextData(), \
-                           ObjectType(ObjectIdentity('1.3.6.1.2.1.1.1.0'))):
-    break
+errorIndication, errorStatus, errorIndex, varBinds = next(
+    getCmd(snmpEngine,
+           authData,
+           transportTarget,
+           ContextData(),
+           ObjectType(ObjectIdentity('1.3.6.1.2.1.1.1.0')))
+)
 
-# Check for errors and print out results
 if errorIndication:
     print(errorIndication)
-else:
-    if errorStatus:
-        print('%s at %s' % (
-            errorStatus.prettyPrint(),
-            errorIndex and varBinds[int(errorIndex)-1][0] or '?'
-            )
+elif errorStatus:
+    print('%s at %s' % (
+        errorStatus.prettyPrint(),
+        errorIndex and varBinds[int(errorIndex)-1][0] or '?'
         )
-    else:
-        for name, val in varBinds:
-            print('%s = %s' % (name.prettyPrint(), val.prettyPrint()))
+    )
+else:
+    for name, val in varBinds:
+        print('%s = %s' % (name.prettyPrint(), val.prettyPrint()))