Once upon the time there was Earl Zope II. His lands where threatened by a huge disaster called “Python 2 sunset”. His only chance was to emigrate to the Python 3 wonderland. After a long preparation phase for himself and his courtiers he was able to move to the new land. But the Python 3 wonderland has strict immigration authorities: They only allow “compatible” fellows to get a residency permit. The permission itself has three levels:
- alpha – To get this level the candidate has to prove that he can breath the Python 3 air and drink the water in this land without getting falling over. Earl Zope II needed a while to acclimate in the Python 3 wonderland as its climate is a bit different from what he was used to.
- beta – This level requires the the acclimation phase was successful and people could start to rely that the candidate will stay in the new land. Earl Zope II reached this level by proving that all his courtiers – he relies on – are ready for this level.
- final – To reach this level the candidate needs to prove that he is living in successful relations in Python 3 wonderland. Other inhabitants must be able to trust him and the services he offers. After Earl Zope II now has reached the beta phase he is now able to offer his services and hope that he gets the final level about fall 2018.
Back in his own country Earl Zope II had the official name “Zope2 2.13”. Before the beta phase of his immigration he thought that he would have to change the name to something like “Zope2 4.0b1”. This is looks ugly and some people protested against this name. With the kind and quick help of Baiju Muthukadan Earl Zope II was able to change his official name to “Zope 4.0b1”. Thank you very much Baiju Muthukadan! Earl Zope is very proud of this new shorter name and is heartily thankful for this opportunity.
The release of the first Beta version means, that no currently existing features will be removed until the final version. But There will be some new features and many bugfixes.
New Features of Zope version 4.0
- Support for Python 3.4 up to 3.6: Currently Python 3 can only be used for new projects. There is only an experimental way to convert an existing ZODB from Python 2 to 3 as it is not possible to run the same
Data.fs under both versions, see zodb.py3migrate.
- Zope now by default runs as a WSGI application. The previously used
ZServer is still supported but only runs under Python 2.
- Chameleon based templates are now the default.
- The name of the distribution changed from
Zope. The previous
Zope2 package will remain as a meta package which depends on
Zope. This allows packages which require Zope 4.x to depend on
Zope instead of
- Removed deprecated code and BBB imports like the
Globals package or the internal help system.
- Some smaller features, bug fixes and security fixes, see the Change log.
A big “Thank you!” to all who made this release possible:
- dedicated people investing time, thoughts and money
- nice companies allowing their people to participate on Zope sprints
- the Plone Foundation sponsoring Zope sprints
We had a great Zope 4 Phoenix Sprint helping to raise Zope from the ashes! Thank you to everybody who participated in Halle or from remote.
Beta one of Zope is out:
We need the feedback to adapt Zope to the needs in the wild. The current plan is to create new beta releases once a while after implementing features resp. bug fixes or on demand. The current plan is to release a final 4.0 version in fall of 2018. This should allow software projects built upon Zope to migrate there code before the Python 2 sunset in 2020.
The gocept team will join PyConWeb 2017 in Munich from 27th to 28th of May – hey, this is is less than one week from now! It seems that there are still tickets available.
I myself will present RestrictedPython – or how to port to Python 3 without porting dependencies on Saturday at 3 p. m.
See you in Munich!
The sprint days were really busy for Earl Zope II and the people helping him with the Python 3 wonderland immigration authorities.
- can be installed using Python 3
- can be started and renders some views
- has more than 1.700 of more than 2.300 tests running
- has some optional dependencies left to be ported.
- To accomplished this by:
- Complete porting of RestrictedPython, so a first alpha release with the new implementation was released. (This includes about 260 commits, nearly 100 files changed, 9.000 lines of newly written code and 1.000 lines of code deleted.)
- Port AccessControl to Python 3. This port covers the Python code of the package.
- Make an alpha release of DocumentTemplate which supports Python 3. It is purely based on Python code. (Thanks Hanno for the porting work from C to Python!)
- Note: There were problems porting AccessControl and DocumentTemplate to PyPy so we left this out for now. (Volunteers welcome!)
Besides working on Zope there was other ongoing work:
- CMFCore, DCWorkflow, GenericSetup now run on Zope 4 using Python 2.
- Even most tests of CMFDefault are now running on Zope 4 – whereas it runs successfully in the browser.
- Some Plone packages were ported to Python 3:
His majesty Earl Zope II says a warm “Thank you!” to all who helped him to start his new live in Python 3 wonderland. There is still enough work to be done so he can live there and having all the comfort and stability of Python 3. See you on the next sprint!
Last information for Zope 2 Resurrection Sprint
We are approaching the Zope 2 Resurrection Sprint and hope that all those who are willing to help earl Zope II on his endeavor to port his realm have already prepared there horses and packed the necessary equipment to arrive in Halle (Saale), Germany.
To help with the preparations we have set up some means of communication:
In the Etherpad we have collected a fundamental set of obstacles that the immigration authority of Python 3 wonderland send to earl Zope II via a mounted messenger. If there are additional problems we need to solve with the immigration or other authorities, feel free to point those out in the pad.
During the sprint we will have an owl waiting for messages in the #sprint channel on irc.freenode.net, so additional information and questions can be placed there.
In general the gates of the gocept manor in Halle (Saale) are open from 8:00 till 18:00 during the sprint for the squires to help earl Zope II. There will be some refreshments in the morning (8:00 – 9:00) and during lunch time (12:00 – 13:00) in order to keep everyone happy and content.
Apart from that, there will be some fixed points in time to meet:
- Monday 2017-05-01
- 19:00 CEST, pre-sprint get-together for early arrivals at Anny Kilkenny. Attention: There will be a bigger political demonstration in Halle which might impact the arrival here, take that into consideration.
- Tuesday 2017-05-02
- 9:00 CEST, official welcome and sprint planning afterwards.
- 16:30-17:30 CEST, Discussion: TBD
- 18:00 CEST, guided tour through the city of Halle, meeting point
- 19:30 CEST, dinner and get-together at Wenzels Bierstuben, location, separate bills
- Wednesday 2017-05-03
- 9:00 CEST, daily meeting and review
- 16:30-18:00 CEST, Discussion: TDB
- 19:00 CEST, BBQ evening in the lovely garden at gocept manor
- Thursday 2017-05-04
- 9:00 CEST, daily meeting and review
- 16:30-17:30 CEST, Discussion: TBD
- 19:00 CEST, dinner and get-together at Pizzeria “Rote Soße”, location, separate bills
- Friday 2017-05-05
- 9:00 CEST, daily meeting and review
- 13:00 CEST, sprint closing session with review and possibility to present lightning talks of your projects.
We are looking forward to the sprint and hope to overcome the remaining migration problems of earl Zope II.
A little tale
Once upon the time there was an earl named Zope II. He lived happily in a land called Python 2. Since some years there where rumours that a huge disaster would hit the country. The people ironically used to call it “sunset”. Prophets arose and said that 2020 would be the year where this disaster would finally happen.
Zope II got anxious about his future and the future of his descendants. But there were some brave people who liked Zope II and told him of the Python 3 wonderland. A land of eternal joy and happiness without “sunset” disasters and with no problems at all. It seemed like a dream to Zope II – too nice to be true?
After some research it became clear that the Python 3 wonderland was real – not completely as advertised by the people but nice to live in. So Zope II set the goal to settle down in the Python 3 wonderland before the “sunset” disaster would happen.
But this was not as easy as it seemed to be. The immigrant authority told Zope II that he is “not compatible” with the Python 3 wonderland and that he needs “to be ported” to be able to breath the special Python 3 air.
As if this was not enough: As an earl Zope II was not able to migrate without his staff, the many people he relied on for his daily procedures. Some of them have been found to be “ported” already thus they were already “compatible” for the new country. But there was one old, but very important servant of Zope II named RestrictedPython. Zope II could not live without him – but he got told that he never will be “compatible”. The authority even required a “complete rewrite”.
The Python 3 wonderland seemed so near but is was so difficult to reach. But there where so many people who helped Zope II and encouraged him not to give up. Eventually it seemed to be possible for Zope II to get beyond the turnpike into the wonderful land called Python 3.
Back in reality
We are the people who like Zope II and help him to get past the turnpike into Python 3. Since the Alpine City Sprint earlier this month RestrictedPython is no longer a blocker for other packages depending on it to be ported.
Come, join us porting the remaining dependencies of Zope and Zope itself to Python 3. There will be a Zope 2 Resurrection Sprint in May this year in Halle (Saale), Germany at gocept. Join us on site or remote.
After reanimation we started defibrillation of Zope and … it kinda worked:
On our sprint we got the following things done to help Zope in the Python 3 wonderland:
As grok builds on the ZTK, it is a beneficiary of the reanimation. The following steps have been undertaken to lead it to the Python 3 wonderland:
We have had a discussion about the broader future of Zope:
- There could be more optional dependencies like ZServer in Zope 4.
- The ZMI could be removed altogether because it was not maintained any more for years. It should not be used by applications built on top of Zope anyway. Plone even suggests to block public access to the ZMI.
- There is a road map needed for Zope 4 so the Plone community can pick it up as decided in the Zope 4 PLIP.
- Further discussions should be held on the zope-dev list and in the issue trackers of the Zope foundation on Github. This seems to be the way to get most people involved who are interested in the future of Zope.
Conclusion: Zope is not dead. On the sprint there were nearly 20 people who use Zope for their daily work. Some of them even joined the sprint without the backup of a company in their spare time. Yes, it will need time and effort to keep Zope alive and make it prosper in the Python 3 wonderland, but Zope is still needed and has its place in the audience of web frameworks.
We at gocept will keep Zope as part of our supported technology stack in the projects it fits the purpose and will offer help to others who need to migrate a long term project into the future. We will be at the PyConDE in Munich at the end of October and will be open for questions and further discussions. Do not hesitate to talk to us.
Now we are helping Zope in the Python 3 wonderland: Almost 20 people started with the reanimation of Zope. We are working mostly on porting important dependencies of Zope to Python 3:
Zope 4 is now per default based on WSGI. Thanks to Hanno who invested much time to make the WSGI story of Zope much more streamlined.
We found out that the ZTK (Zope Toolkit) is no longer used in any of the projects using packages of it (Zope, Grok, Bluebream – as it is dead). It should be kept to test compatibility between the packages inside the ZTK.