SNMPv2c - TypeError: can't concat str to bytes

[RobLk]

Hi!

I'm trying to use snmp 0.5.0 inside a docker container with Ubuntu and Python 3.11.3 installed. When I try to execute the following code from the documentation:

from snmp import Engine, SNMPv2c

with Engine(SNMPv2c, defaultCommunity="public") as engine:
    localhost = engine.Manager("127.0.0.1")
    response = localhost.get("1.3.6.1.2.1.1.4.0", "1.3.6.1.2.1.1.6.0")
    print(response)

I receive the following error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[11], line 5
      3 with Engine(SNMPv2c, defaultCommunity="public") as engine:
      4     localhost = engine.Manager("127.0.0.1")
----> 5     response = localhost.get("1.3.6.1.2.1.1.4.0", "1.3.6.1.2.1.1.6.0")
      6     print(response)

File /opt/conda/lib/python3.11/site-packages/snmp/manager/v2c.py:164, in SNMPv2cManager.get(self, *oids, **kwargs)
    162 def get(self, *oids, **kwargs):
    163     pdu = GetRequestPDU(*oids)
--> 164     return self.sendRequest(pdu, **kwargs)

File /opt/conda/lib/python3.11/site-packages/snmp/manager/v2c.py:155, in SNMPv2cManager.sendRequest(self, pdu, community, wait, **kwargs)
    153 with self.lock:
    154     heapq.heappush(self.requests, reference)
--> 155     request.send()
    157 if wait:
    158     return request.wait()

File /opt/conda/lib/python3.11/site-packages/snmp/manager/v2c.py:86, in Request.send(self)
     84 now = time.time()
     85 self.nextRefresh = now + self.period
---> 86 self.reallySend()

File /opt/conda/lib/python3.11/site-packages/snmp/manager/v2c.py:62, in Request.reallySend(self)
     61 def reallySend(self):
---> 62     self.manager.sendPdu(self.pdu, self, self.community)

File /opt/conda/lib/python3.11/site-packages/snmp/manager/v2c.py:135, in SNMPv2cManager.sendPdu(self, pdu, handle, community)
    134 def sendPdu(self, pdu, handle, community):
--> 135     self.dispatcher.sendPdu(
    136         self.locator,
    137         MessageProcessingModel.SNMPv2c,
    138         pdu,
    139         handle,
    140         community,
    141     )

File /opt/conda/lib/python3.11/site-packages/snmp/dispatcher.py:87, in Dispatcher.sendPdu(self, locator, mpm, pdu, handle, *args, **kwargs)
     84         mpm = str(MessageProcessingModel(mpm))
     85         raise ValueError("{} is not enabled".format(mpm)) from err
---> 87 msg = mp.prepareOutgoingMessage(pdu, handle, *args, **kwargs)
     88 transport.send(locator.address, msg)

File /opt/conda/lib/python3.11/site-packages/snmp/message/v2c.py:111, in SNMPv2cMessageProcessor.prepareOutgoingMessage(self, pdu, handle, community)
    108     pdu.requestID = self.cache(cacheEntry)
    109     handle.addCallback(self.uncache, pdu.requestID)
--> 111 return Message(self.VERSION, community, pdu).encode()

File /opt/conda/lib/python3.11/site-packages/snmp/types.py:76, in Asn1Encodable.encode(self)
     75 def encode(self) -> bytes:
---> 76     return encode(self.TYPE, self.serialize())

File /opt/conda/lib/python3.11/site-packages/snmp/types.py:499, in Constructed.serialize(self)
    498 def serialize(self) -> bytes:
--> 499     return b"".join([item.encode() for item in self])

File /opt/conda/lib/python3.11/site-packages/snmp/types.py:499, in <listcomp>(.0)
    498 def serialize(self) -> bytes:
--> 499     return b"".join([item.encode() for item in self])

File /opt/conda/lib/python3.11/site-packages/snmp/types.py:76, in Asn1Encodable.encode(self)
     75 def encode(self) -> bytes:
---> 76     return encode(self.TYPE, self.serialize())

File /opt/conda/lib/python3.11/site-packages/snmp/ber.py:281, in encode(identifier, data)
    279 def encode(identifier: Identifier, data: bytes) -> bytes:
    280     """Encode a message under ASN.1 Basic Encoding Rules."""
--> 281     return identifier.encode() + encode_length(len(data)) + data

TypeError: can't concat str to bytes

Do you know how may I solve it or what may cause it? Thanks!

[RobLk]

I'm sorry. Duplicated.

Closing it.