pysnmp-sky/CHANGES.txt

Mon Nov  8 22:11:59 MSK 2004

Changes to version 4.0.0
------------------------

- Major re-design and re-implementation.
- SMI framework designed and implemented. This framework provides 
  1) various access to MIB data 2) a way to implement custom MIB
  instrumentation objects. There's also a tool for building SMI classes
  from libsmi(3) output (smidump -f python).
- ASN.1 subtyping machinery implemented. Now dynamic ASN.1 instances
  subtyping and quering becomes available. Previously, this has been done
  through Python classes inheritance what proved to be a wrong concept.
- ASN.1 codecs framework re-designed and re-implemented aimed at a more
  consistent design and better performance. Highlights include abstract
  codec interface and serialized data caching (at encoder).
- Asn1Item constraints machinery re-implemented based on Mike C. Fletcher's
  design and code. Now various constrains are implemented as stand-alone
  objects serving interested Asn1Object derivatives through some abstract
  protocol (that's probably the Decorator design pattern).
- ASN.1 tagging facility re-implemented along the client-server design
  pattern. Besides this seems to be a more appropriate design, it allows
  an easier way for dynamic subtyping.

Fri Oct  22 18:23:43 MSK 2004

Changes to version 3.4.3
------------------------

- Bugfixes and improvements to pysnmp.test code
- Bugfix to asn1.univ.Null() -- always initialize to an empty string
- Python < 2.0 issue fixed at pysnmp.asn1 (defined slice operations for custom
  sequence objects)
- Bugfix to compatibility class v1.Message: decode() overloaded to 
  behave like original on BER decoding errors
- Fixed __cmp__ methods at pysnmp.base to hide coercion errors on comparation
- The examples/manager/snmpset.py example added for clarity

Sun Feb  8 19:12:34 MSK 2004

Changes to version 3.4.2
------------------------

- The pysnmp.test package implemented (pyunit based).
- Bugfix to pysnmp1.x compatibility API that makes it operational
  again.
- Bugfix to None -> Null() value translation at proto.api.generic.
- Bugfix to OIDs comparation & SNMP error propagation code at
  proto.api.generic.
- Bugfix to role.Agent instantiation at asyncrole.Agent code.
- The VarBindMixIn.apiAlphaSetOidVal() method now does not modify current
  oid and/or val whenever None's passed as oid and/or val parameters
  respectively.

Thu Feb  5 18:35:38 MSK 2004

Changes to version 3.4.1
------------------------

- The examples/* tools reworked to act more like examples while full-blown
  SNMP tools (along with their CLI and friends) moved to a stand-alone package
  which is pysnmp-apps available from PySNMP homepage.
- Components caching implemented at almost all asn1.base.Asn1Object
  deviratives what aims at significant performance improvement. What is
  related to this change is that various structured ASN.1 objects might not
  now return newly created inner components as well as not copying (but
  borrowing) passed objects on assignment.
- The pysnmp.mapping.udp.bulkrole module dropped as it looks somewhat
  redundant to asynrole functionality.
- Alpha API to pysnmp.proto objects is now the API of choice. Besides
  other improvements, this package introduces a protocol version-neutral
  API. Previous Generic API (pysnmp.proto.api.generic) remains for
  compatibility.
- Code cleaned up to better comply with coding standards. Particularily,
  some symbols changed their case, though, aliases set for compatibility.
- The suggested way to process SNMP responses at role.Agent has been changed
  to perform complete response processing at the callback function (cbFun).
  That's why the sendAndReceive() method of role.Agent class now accepts cbCtx
  parameter.

Thu Oct 30 18:43:44 MSK 2003

Changes to version 3.3.6
------------------------
- Another bugfix to broken errorIndex/VarBindList handling
  at examples/*.py tools
- Syntax error fixed at cli/ucd/rfc1157.py
- Bugfix to asn1.ObjectIdentifier labeling code
- Bugfix to VarBindList initialization at compat.pysnmp2x
- Bugfix to extra data at the tail of structured types BER octetstream
  handling

Wed Aug 27 22:45:44 MSD 2003

Changes to version 3.3.5
------------------------

- The examples/snmp*walk.py tools fixed not to query first OID in range
  by GetRequest unless explicitly specified by command line.
- The -C<p|i|c> option implemented at examples/snmp*walk.py tools
- Bugfix to empty/malformed VarBindList reference by ErrorIndex on
  ErrorStatus reported at examples/* tools.
- Syntax errors fixed at pysnmp/mapping/udp/asynrole.py and
  pysnmp/proto/cli/ucd/rfc1905.py
- The manager class at pysnmp/mapping/udp/role.py fixed not to connect()
  to default destination as this prevents underlying socket from
  receiving UDP from non-default source (some agents appear to respond
  from a strange IP/port). Note: this change raises the risk of agent
  IP/port spoofing!
- New another flavor of API to protocol objects (pysnmp.proto.api.alpha)
  implemented as a superset of pysnmp.proto.api.generic API, which
  remains fully functional.
- Bugfix to v*.SetRequest.Community initialization at pysnmp.proto
- Bugfix to ObjectIdentifier class wrapper at pysnmp.compat.pysnmpxx
- rfc1902 BITS construct implemented (as an ApplicationSyntax component
  whilst SMI defines it as one of possible Syntax values. Why it's defined
  so and what's the right implementation is still unclear to me).
- Obsolete rfc1442 BIT STRING type implemented to handle outdated SNMP
  entities.
- Make pysnmp.mapping.udp.role.manager attempting to resolve and cache default
  agent IP on instantiation for better peformance.

Thu Jun 07 19:23:33 MSD 2003

Changes to version 3.3.4
------------------------

- Raw values access interface of asn1.base.SimpleAsn1Object reworked for
  better performance
- initialValue of asn1.base.SimpleAsn1Object class objects may now be
  defined as method
- Bugfix to asn1.base.SimpleAsn1Object value assignment -- copy mutable
  values rather then store a reference to the passed one
- The tree-making facility of asn1.univ.ObjectIdentifier class reworked
  for better performance and clearer protocol
- Bugfix initial value assignment of proto.rfc1157.RequestId & 
  proto.rfc1905.RequestId classes to get much less repetitive values
- The getTerminal() method implemented to all base ASN1 data types
  (simple & structed) for a more constent API
- Bugfix to examples/* var-bind pretty printing (IpAddress wouldn't print).
- UCD command line interface mixins now support the rest of SNMP data types
  (Gauge, Counter32 etc.)

Thu Mar 20 18:43:55 MSD 2003

Changes to version 3.3.3
------------------------

- The constraints methods set of asn1.base.Asn1Object converted to
  a set of flags accompanied by a single constraints checking
  method for better efficiency.
- The asn1.base.ChoiceTypeAsn1Object.get() method converted to
  getTerminal() to handle possible structured Choice elements
  (may cause incompatibilities!).
- ber.base.decodeTag() function substitutes functionally similar
  code scattered over a few BER decoders.
- asn1.univ.ObjectIdentifier.str2num()/num2str() methods code optimized
  for better performance.
- Bugfix to handle_error() methods of udp.asynrole.manager/agent.
- Bugfix to examples/snmpwalk.py v2c.EndOfMibView handling in
  response.
- examples/ converted to use `env' for interpreter invocation.
- Many minor optimization changes.

Wed Mar 19 18:01:05 MSD 2003

Changes to version 3.3.2
------------------------

- Bugfix to examples/asyncmgr.py to make the tool simultaneous
  request safe
- Bugfix to setup.py -- some sub-packages were not installed
- The request-specific match() method of proto.v1 and proto.v2c
  split on request and PDU-specific parts
- Half-baked SNMP v.3 files appeared in 3.3.1 by mistake (rfc2571.py, 
  rfc2572.py) excluded

Tue Jan 14 19:41:21 MSD 2003

Changes to version 3.3.1
------------------------

- role.manager() now uses a user-specified callback function to
  verify received SNMP messages (this mostly addresses the out-of-order
  SNMP messages problem).
- examples/* tools updated to utilize role.manager()'s message verification
  callback function
- Net-SNMP-style command-line interface implemented (as a sub-package
  pysnmp.proto.cli)
- High-level API to SNMP message objects implemented (as a sub-package
  pysnmp.proto.api)
- The examples/asyncmgr.py tool now supports all available SNMP message
  types
- pysnmp.asn1.ber sub-package re-written to act as an optional mix-in
  to base ASN.1 objects (and moved under pysnmp.asn1.encoding package)
- quite a few small fixes

Thu Nov 14 18:09:53 MSD 2002

Changes to version 3.2.2
------------------------

- Bugfix to default value for 'dst' address parameter in
  mapping/udp/role.py, mapping/udp/asynrole.py and
  mapping/udp/bulkrole.py.
- asyncode compatibility bugfix to asynrole.manager.handle_error()   
  and asynrole.agent.handle_error() parameters list. Affected the
  mapping/udp/asynrole.py and examples/asyncmgr.py scripts.
- Bugfix to transport-level exceptions handling code in
  examples/snmpbulk.py and mapping/udp/bulkrole.py.
- Bugfix to reportTypeFlag handling at examples/snmpbulk.py.
- Command line parameters support implemented to the
  examples/asyncmgr.py script.

Thu Oct 31 08:32:49 MSD 2002

Changes to version 3.2.1
------------------------

- asn1.base.ChoiceTypeAsn1Object.get() method added for recursively
  fetching enclosed scalar terminals whenever possible.
- examples/*.py scripts updated to make use of the above feature
  (by means of -R command line swich).

Tue Oct 15 23:53:32 MSD 2002

Changes to version 3.1.3
------------------------

- A few bugs fixed in example/snmptrap.py and example/snmpset.py

Sat Oct 12 10:43:46 MSD 2002

Changes to version 3.1.2
------------------------

- Incorrect params to role.agent() constructor in examples/snmptrapd.py fixed
- The __all__ list memebers in rfc1155.py and rfc1902.py updated

Fri Oct 11 18:34:31 MSD 2002

Changes to version 3.1.1
------------------------

- A bug in setup.py (that prevents package installation) has been fixed.
- Syntax typo in asynrole.py has been fixed.

Mon Oct  7 08:29:58 MSD 2002

Changes to version 3.1.0
------------------------

- The snmpy compatibility sub-package added.
- __hash__() methods implelented for Asn1Object-based
  objects.
- Many stupid typos fixed thoughout the code.

Tue Oct  1 08:02:43 MSD 2002

Changes to version 3.0.0
------------------------

- Major re-write of the whole package aimed at a more accurate, standards
  compliant and extensible ASN.1 and SNMP protocol objects implementation.

  Backward compatibility with earlier PySMMP versions is preserved by means
  of compatibility sub-packages.

Wed Dec 18 20:39:00 MSD 2002

Changes to version 2.0.8
------------------------

- Convert examples/snmptable.py into examples/snmpwalk.py as the
  functionality of the former seems to closer mimic Net-SNMP's
  snmpwalk behavior.
- The examples/snmpwalk.py fixed to include requested OID in the
  search range.

Thu Nov 28 18:58:45 MSD 200

Changes to version 2.0.7
------------------------

- Bugfix to asn1.py, incorrect ASN.1 tag used for UNSIGNED32 type.
- Bugfix to v1.py & v2c.py modules, GAUGE32 was missing from the
  list of allowed value-bind types.

Fri Sep 20 08:35:43 MSD 2002

Changes to version 2.0.6
------------------------

- Bugfix: in bulkrole.py, ignore transport errors by catching
  error.Error based exceptions.
- Use repr() when reporting garbaged octet stream on decoder input.

Tue Jul 16 12:19:35 MSD 2002

Changes to version 2.0.5
------------------------

- Bugfix: use long ints in integers decoders of asn1.py to prevent a
  wrapover on left shift what sometimes decodes to negative in unsigned
  data types decoders.

- Verify against negative initializers to unsigned data types.

- Split up BER decoders of asn1.INTEGER and asn1.UNSIGNED32 classes,
  derive asn1.COUNTER64 class from asn1.UNSIGNED32 for clarity.

Tue Jun 25 8:34:39 MSD 2002

Changes to version 2.0.4
------------------------

- Bugfix: the 'UPTIME' BER tag removed from asn1.BERHEADER.TAGS dictionary
  as it seems to duplicate the 'TIMETICKS' flag what accidentally causes
  pysnmp.asn1.TypeError exception.

- The FLAGS dictionaries in various classes split up to CLASS and
  FORMAT ones to better follow BER specification.

- The asn1.TAGGEDSEQUENCE class renamed to asn1.SEQUENCE as the latter
  seems not to be defined and used in SNMP context.

Fri Jun 21 08:54:43 MSD 2002

Changes to version 2.0.3
------------------------

- Bugfix: role.agent class constructor must be passed a list type parameter.

Fri Jun   7 10:35:30 MSK 2002

Changes to version 2.0.2
------------------------

- Bugfix: non-existent exception class error.PySNMPError replaced with
  error.Generic in asynchronous code. 

- Bugfix: check that exc_type is not None in asyncmgr.py
  telnet_server.request_done_fun() to see if an exception
  occurred.

Mon May  20 18:55:09 MSK 2002

Changes to version 2.0.1
------------------------

- The whole package has been completely redesigned and rewritten
  in a more object-oriented fashion.

  Major changes from user's point of view include:

  * SNMP v.2c support added;

  * SNMP agent (server) support added to SNMP transport code;
 
  * API level compatibility with previous PySNMP versions is
    not preserved at the moment (work on the compatibility layer is
    in progress).

Changes to version 1.6.5
------------------------

- Distutils support added by drt@un.bewaff.net.

Tue Sep  25 18:34:56 MSK 2001

Changes to version 1.6.4
------------------------

- The snmpagent.py script previously contributed by Cayce Ullman
  updated by Ivan Begtin to run with the latest versions of PySNMP.

- Oddly handled exceptions fixed to msession.multisession() class. Thanks
  to Chris Green for pointing out.

- Inconsistent default return value fixed in multisession.retrieve() method.
  This bug may lead to IndexError on timed out SNMP request. Thanks to
  Chris Green for a patch.

Fri Jun  22 08:55:39 MSK 2001

Changes to version 1.6.3
------------------------

- Bug fixed in examples/async_snmpget.py: this example script misses
  async_session() class structure change introduced in version 1.6.1.
  Thanks to Chris Green for a patch.

- Also, a minor improvement has been made to examples/async_snmpget.py
  script -- now this script handles cases when remote SNMP agent returns
  SNMP error in reply.

Sat Jun  16 11:06:34 MSK 2001

Changes to version 1.6.2
------------------------

- Missing "opaque" ASN.1 data type support committed to BER engine. Thanks
  to Carl Bray for providing a patch for it.

Sat May  5 10:02:40 MSK 2001

Changes to version 1.6.1
------------------------

- SNMP traps support has finally been completed. Example agent and manager
  along with some documentation included. Thanks to Ted Crossman for initial
  traps handling code.

- The ber.decode_ipaddress() method renamed to ber.decode_ipaddr() to
  look as a counterpart to ber.encode_ipaddr(). Compatibility stub
  ber.encode_ipaddress() remained.

- __doc__ strings improved throughout the code.

- BER engine code slightly optimized for a little bit better performance.

Thu Mar 22 08:37:02 MSK 2001 

Changes to version 1.5.5
------------------------

- In objid.objid(), the str variable name replaced with txt to avoid
  interferention with str() builtin function. Thanks to Kal Lin for
  pointing it out.

- Bug fixed in ber.encode_an_integer() and ber.decode_integer() methods.
  They used to handle negative integers in a wrong way. Thanks to
  Tim Kwiatkowski <jtk@bluesky.ecas.ou.edu> who has fixed this problem
  by rewriting corresponding code from the scratch.

Fri Mar  9 19:02:56 MSK 2001

Changes to version 1.5.4
------------------------

- Package documentation added (still not quite complete).

- The implementation of ber.encode_oid() method replaced with a more
  consistent one, as suggested by Jarkko Torppa. This also removes a
  limitation on the size of sub-Object IDs to be encoded.

- Bug fixed in pysnmp.asynsnmp module -- import of pysnmp components was
  incorrect.

- Bug fixed in multisession.retrieve() -- trick SNMP failures to empty
  responses.

- The multisession.initialize() method added to facilitate class instances
  reuse.

- In async_session.send_request(), the 'type' argument moved to the last
  position of the argument list and assigned the default value ('GETREQUEST').
  Unfortunately, this change may cause API incompatibility with the
  previous versions of PySNMP.

- The async_session.open() method introduced as a result of splitting
  apart the async_session.__init__() method. This is done to let user
  of async_session class modify class instance private variables (port,
  iface) before they take effect. This change may also cause API
  incompatibility.

- In async_session.__init__(), verify the callback_fun argument to make sure
  it's callable.

- In message.__init__(), the 'version' argument moved to the very end of
  argument list, as it is never need to be modified. This change may cause
  API incompatibility.

- In message.message() class, the 'decode_pdu' method renamed into
  'decode_snmp_pdu' for a more consistent view. This change might not
  affect API compatibility.

- In error.py, the 'BERError' class renamed into 'BEREngineError' while
  'EngineError' one renamed into 'SNMPEngineError'. This change may cause
  API incompatibility.

- In examples/*.py, the repr() builtin replaced with str() one as it looks
  more appropriate for printing.

- In message.message() class, default values for 'type', 'encoded_oids'
  and 'encoded_vals' arguments in method encode_request() removed.

- In message.message() class, default value for 'response' arguments in
  method decode_response() removed.

- Receive buffers of SNMP engines enlarged up to maximum UDP datagram
  size (65536 bytes) to accomodate possible huge Object IDs' values
  in replies.

- In multisession.retrieve(), delete the list of SNMP sessions on finish
  to save memory.

- More explanation messages added to exception class instantiations.

Tue Mar  6 18:06:56 MSK 2001

Changes to version 1.5.3
------------------------

- Example code in README fixed. Thanks to Jeff Wong and Charles Kong for
  it pointing out.

Fri Feb 23 12:28:59 MSK 2001

Changes to version 1.5.2
------------------------

- The ber.encode_length() & ber.decode_length() methods modified to allocate
  up to three extra bytes for storing the length of BER encoded data item or
  raise an exception if data item is too large (>16MB).

Sun Jan 21 13:56:41 MSK 2001

Changes to version 1.5.1
------------------------

- The pysnmp module converted into pysnmp package. This change might
  cause an incompatibility with previous PySNMP versions, as it
  affects the way how user refers to pysnmp components.

- All the PySNMP components converted to use class-based exceptions.

- Comments to files converted to module __doc__ attribute.

- The arguments to all objid.objid() methods as well as caller_fun argument
  to asynsnmp.async_session() class constructor becomes mandatory.

- Fixed a bug caused an infinit loop in msession.dispatch(), thanks to
  Case Van Horsen for tracking it down.

- The repr() function is used in examples/ scripts in place of %
  for a more consistent result types coercion.

- The documentation has been taked out of the distribution for a re-work
  to get it reflecting 1.5.x changes.

Thu Jan 11 11:42:13 MSK 2001

Changes to version 1.4.2
------------------------

- Argument verification for the most of ber.ber() methods removed,
  as it looks exessive (user must follow API specs).

- A bug is fixed in ber.decode_uptime(), thanks to Case Van Horsen for
  pointing it out.

- The pysnmp.multisession() class has been re-written. The new version
  is based on Case Van Horsen's code. Most importantly, a bug which
  may cause some agents' responses get lost is fixed. Also, the new code
  makes more efficient use of sockets.

  From the pysnmp.multisession() API perspective, the
  multisession.encoded_pairs attribute has been removed from class
  definition, as it seems to be of no use. The multisession.retrieve()
  method should be used instead.

Sat Dec 30 21:25:56 MSK 2000

Changes to version 1.4.1
------------------------

It's a major rewrite meant to remove known oddities. Unfortunately,
the API had to be changed a bit. The changes follow:

- The SNMP errors reported by remote SNMP process are now indicated
  with the single exception (pysnmp.SNMP_ERROR) while the details
  are supplied along with the exception associated value (see docs).

- Class constructor of pysnmp.session() class now accepts only a few
  arguments (agent, community). The rest of arguments (such as UDP port
  number, SNMP version etc.) are now available as the attributes of
  pysnmp.session() class instances (see docs).

- Instances of pysnmp.session() class now have the 'iface' attribute
  which carries the address of local interface SNMP engine is to bind()
  to (see docs).

- The pysnmp.bad_parameters exception has been replaced with
  pysnmp.bad_argument one as they seem to have very similar
  semantics.

- Class constructor of pysnmp.multisession() class does not accept any
  arguments. SNMP engine parameters are now avaliable as class instances 
  attributes (see the comment on pysnmp.session() class constructor above).

- The asynsnmp.async_session() class now subclasses the pysnmp.session()
  class for the purpose of inheriting the API of pysnmp.session() class.
  Consequently, the asynsnmp.async_session() class constructor now accepts
  only a few [major] parameters. The minor ones should be referred as class
  instance attributes (see docs).

- In async_session.handle_read(), when calling caller specified callback
  function, pass caller a reference to ourselves along with a reference to
  caller specific data. N.B. This leads to callback function's arguments list
  change what may cause incompatibility problem to the user of asyncsnmp()
  class!

- The pysnmp.packet() class renamed to pysnmp.message() as it better represents
  its functionality. This also may cause some incompatibilities, though, I do
  not expect great many people explicitly refer to it from their applications.

- Some comments in the code turned to objects' doc strings.

- The examples/ stuff has been re-written for a more consistent view;

- Module documentation added.

Thu Nov 16 08:49:14 MSK 2000

Changes to version 1.3.14
-------------------------

- The license of the PySNMP package changed for a [more relaxed] BSD License;

Fri Nov  3 19:20:02 MSK 2000

Changes to version 1.3.13
-------------------------

- Fixed wrong (non-tuple type) argument passed to socket.connect() method in
  session.open();

Mon Sep 11 11:47:12 MSD 2000

Changes to version 1.3.12
-------------------------

- bug fixed in IP address encapsulation method (ber.encode_ipaddr()). Thanks
  to Jarkko Torppa for pointing it out!

Fri Sep  8 11:51:34 MSD 2000

Changes to version 1.3.11
-------------------------

- the obsolete standard Python module 'rand' replaced with 'whrandom'
  in pysnmp.py for better portability. The random numbers generator is
  used for SNMP RequestID initialization. This change also enlarges the
  range of possible RequestID values from 0 to 0x7fffffff.

- contribution/ directory introduced and Cayce Ullman's PySNMP based
  SNMP agent put there as an example of possible PySNMP use;

Mon Sep  4 15:04:05 MSD 2000

Changes to version 1.3.10
-------------------------

- catch all possible SNMP related exceptions in async_session.handle_read()
  and convert them into (None, None) result as they would arrive out of
  context at that point (this is subject for further re-work);

- a syntax error fixed in ber.encode_ipaddr() thanks to Stefan Sami-Soueiha
  who pointed this out;

Fri Aug  4 09:50:37 MSD 2000

Changes to version 1.3.9
------------------------

- initialize SNMP Request-Id to a random value (by means of rand.rand())
  in pysnmp.packet class constructor. This makes sense when user doesn't re-use
  pysnmp object for subsequent SNMP queries but re-creates new pysnmp
  object for every request;

- convert possible pysnnp exceptions when decoding SNMP reply in
  async_session.handle_read() into (None, None) result as a pysnmp
  exception at that point would arrive out of context;

- do not destroy pysnmp.session object in async_session.handle_read()
  method as pysnmp.session object may be re-used;

Tue May 30 18:32:23 MSD 2000 

Changes to version 1.3.8
------------------------

- a bunch of changes to pysnmp.multisession class suggested by Case Van Horsen.
  These changes make objects of multisession class handling socket exceptions
  rather than passing them up to mother application;
- socket variable at pysnmp.py: replaced with sock as Case Van Horsen
  reported that it interferes with the socket module;

Mon Mar 20 18:48:54 MSK 2000

Changes to version 1.3.7
------------------------

- pysnmp.objid class moved to a dedicated module objid.py;
- ber.ber now superclasses objid.objid class;
- pysnmp.session.__init__() doesn't create an instance of pysnmp.objid()
  class (THIS MAY CAUSE BACKWARD INCOMPATIBILITY, please, let me know
  if you think I should maintain backward compatibility at this point
  of code);
- ber.decode_value() now attempts to decode an Object-Id type argument
  as suggested by Case Van Horsen;
- examples/*.py changed to utilize ber.decode_value() method against
  Object-ID's;
- tabs converted to spaces through all the *.py files;
- a few cosmetic changes applied to code;

Tue Jan 25 00:22:18 MSK 2000

Changes to version 1.3.6
------------------------

- the README example corrected, thanks to Carl Bray <cbray@Orchestream.com>;

Wed Jan 19 14:43:31 MSK 2000

Changes to version 1.3.5
------------------------

- the asynchronous SNMP manager class previously founded in
  examples/async_snmpget.py moved to a separate module asynsnmp.py;
- examples/async_snmpget.py now imports asynchronous SNMP manager class
  from asynsnmp.py module;

Mon Jan 17 15:50:04 MSK 2000

Changes to version 1.3.4
------------------------

- session.open() now returns the socket object it created;
- added a session.get_socket() method which returns socket object
  previously created with session.open() method;
- examples/async_snmpget.py added;

Thu Nov 25 16:42:59 MSK 1999

Changes to version 1.3.3
------------------------

- added a method which figures out if one OBJID is a prefix of another OBJID
  (this is used in table retrieval;
- example/snmptable.py added;

Sat Nov 13 23:43:08 MSK 1999

Changes to version 1.3.2
------------------------

- community argument of examples/* tools is now obligatory;
- multisession example of snmpget tool converted to snmpbulk tool;

Wed Nov 10 18:06:34 MSK 1999

Changes to version 1.3.1
------------------------

- a couple of bugfixes for BER [en,de]coders reported by 
  Steve Cochran <steve@more.net> commited to the distribution;

Thu Oct 28 17:40:09 MSD 1999

Changes to version 1.3
----------------------

- example/snmpset.py added;

Sun Oct 17 17:42:31 MSD 1999

Changes to version 1.2
----------------------

- examples/* tools now support command line arguments;
- order of the arguments of session.__init__() and multisession.submit_request()
  changed to better use defaults;
- order of the arguments of session.decode_response() changed, response type
  may now be ommited;

Sat Oct 16 19:19:00 MSD 1999

Changes to version 1.1
----------------------

- more checks against inconsistent arguments passed to various methods added;
- SMTP request type can now be passed to the packet constructing methods;
- more comments added to the code;
- a Object ID's convertion class (pysnmp.objid) added;
- examples/* updated (snmpwalk.py added);
- a few significant bugs fixed;