Mailman 3 January 2020 - Distutils-SIG

Improving Communication
by Donald Stufft July 30, 2020

July 30, 2020

Currently in the packaging space, we have a number of avenues for communication, which are: - distutils-sig - pypa-dev - virtualenv-users - Other project specific mailing lists - IRC - gitter - Various issue trackers spread across multiple platforms. - Probably more places I’m not remembering. The result of this is that all discussion ends up being super fractured amongst the various places. Sometimes that is exactly what you want (for instance, someone who is working on the wheel specs probably doesn’t care about deprecation policy and internal module renaming in pip) and sometimes that ends up being the opposite of what you want (for instance, when you’re describing something that touches PyPI, setuptools, flit, pip, etc all at once). Theoretically the idea is that distutils-sig is where cross project reaching stuff goes, IRC/gitter is where real time discussion goes, and the various project mailing lists and issue trackers are where the project specific bits go. The problem is that often times doesn’t actually happen in practice except for the largest and most obvious of changes. I think our current “communications stack” kind of sucks, and I’d love to figure out a better way for us to handle this that solves the sort of weird “independent but related” set of projects we have here. From my POV, a list of our major problems are: * Discussion gets fractured across a variety of platforms and locations, which can make it difficult to actually keep up with what’s going on but also to know how to loop in someone relevant if their input would be valuable. You have to more or less simultaneously know someone’s email, Github username, IRC nick, bitbucket username, etc to be able to bring threads of discussion to people’s attention. * It’s not always clear to users where a discussion should go, often times they’ll come to one location and need to get redirected to another location. If any discussion did happen in the incorrect location, it tends to need to get restarted in the new location (and depending on the specific platform, it may be impossible to actually redirect everyone over to the proper location, so you again, end up fractured with the discussion happening in two places). * A lot of the technology in this stack is particularly old, and lacks a lot of the modern day affordances that newer things have. An example is being able to edit a discussion post to fix typos that can hinder the ability of others to actually understand whats being talked about. In your typical mailing list or IRC there’s no mechanism by which you can edit an already sent message, so your only option is to either let the problem ride and hope it doesn’t trip up too many people, or send an additional message to correct the error. However these show up as additional, later messages which someone might not even see until they’ve already been thoroughly confused by the first message (since people tend to read email/IRC in a linear fashion). - There is a lot of things in this one, other things are things like being able to control in a more fine grained manner what email you’re going to get. - Holy crap, formatting and typography to make things actually readable and not a big block of plaintext. * We don’t have a clear way for users to get help, leaving users to treat random issues, discussion areas, etc as a support forum, rather than some place that’s actually optimized for that. Some of this ties back into some of the earlier things too, where it’s hard to actually redirect discussions These aren’t *new* problems, and often times the existing members of a community are the least effected becasue they’ve already spent effort learning the ins and outs and also curating a (typically custom) workflow that they’ve grown accustomed too. The problem with that is that often times that means that new users are left out, and the community gets smaller and smaller as time goes on as people leave and aren’t replaced with new blood, because they’re driven off but the issues with the stack. A big part of the place this is coming from, is me sitting back and realizing that I tend to be drawn towards pulling discussions into Github issues rather than onto the varying mailing lists, not because that’s always the most appropriate place for it, but because it’s the least painful place in terms of features and functionality. I figure if I’m doing that, when I already have a significant investment in setting up tooling and being involved here, that others (and particularly new users) are likely feeling the same way. - Donald

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PyPi not allowing duplicate filenames
by Chris Barker April 20, 2020

April 20, 2020

Hi all, PyPi does not allow duplicate file names -- this makes lots of sense, because you really don't want people to go to PyPi one day and grab a file, and then go there another day, grab a file with exactly the same name, and have it be a different file. However.... We are all too human, and make mistakes when doing a release. All to often someone pushed a broken file up to PyPi, often realizes it pretty quickly -- before anyone has a chance to even download it (or only the dev team as, for testing...). In fact, I was in a sprint last summer, and we decided to push our package up to PyPi -- granted, we were all careless amateurish noobs, but we ended up making I think 4! minor version bumps because we had done something stupid in the sdist. Also -- the latest numpy release got caught in this, too: """ * We ran into a problem with pipy not allowing reuse of filenames and a resulting proliferation of *.*.*.postN releases. Not only were the names getting out of hand, some packages were unable to work with the postN suffix. """ So -- I propose that PyPi allow projects to replace existing files if they REALLY REALLY want to. You should have to jump through all sorts of hoops, and make it really clear that it is a BAD IDEA in the general case, but it'd be good to have it be possible. After all -- PyPi does not take on responsibility for anything else about what's in those packages, and Python itself is all about "we're all consenting adults here" I suppose we could even put in some heuristics about how long the file as been there, how many times it's been downloaded, etc. Just a thought.....I really hate systems that don't let me roll back mistakes, even when I discover them almost immediately... -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chris.Barker(a)noaa.gov

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ImportError running 'test' on namespace package - other package in namespace not found
by Jason R. Coombs April 17, 2020

April 17, 2020

I've got two projects: mynamespace.myprojectA and mynamespace.myprojectB myprojectB depends on myprojectA. I'm using setuptools 0.6c8 to manage both projects. Both projects are registered using 'setup develop'. Both projects are accessible from an interactive interpreter: PS C:\Users\me\projects> python Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import mynamespace.myprojectA >>> import mynamespace.myprojectB >>> from mynamespace.myprojectA import mymoduleZ However, when I run 'setup test' in myprojectB, the tests fail with File ".mymoduleZ.py", line NNN, in [some context] from mynamespace.myprojectA.mymoduleZ import MyClassC ImportError: No module named myprojectA.mymoduleZ In setup.py, the test_suite is nose.collector. I searched and couldn't find anyone else with this problem. Is this a supported configuration? Is there something I can do to make tests work with interdependent projects with the same root namespace? If there's not something obvious I should be doing differently, I'm happy to put together a minimal test case that reproduces the problem. Any suggestions are appreciated. Sincerely, Jason R. Coombs

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Surviving a Compromise of PyPI - PEP 458 and 480
by Vladimir Diaz Feb. 12, 2020

Feb. 12, 2020

Hello everyone, I am a research programmer at the NYU School of Engineering. My colleagues (Trishank Kuppusamy and Justin Cappos) and I are requesting community feedback on our proposal, "Surviving a Compromise of PyPI." The two-stage proposal can be reviewed online at: PEP 458 http://legacy.python.org/dev/peps/pep-0458/ PEP 480 http://legacy.python.org/dev/peps/pep-0480/ Summary of the Proposal: "Surviving a Compromise of PyPI" proposes how the Python Package Index (PyPI) can be amended to better protect end users from altered or malicious packages, and to minimize the extent of PyPI compromises against affected users. The proposed integration allows package managers such as pip to be more secure against various types of security attacks on PyPI and defend end users from attackers responding to package requests. Specifically, these PEPs describe how PyPI processes should be adapted to generate and incorporate repository metadata, which are signed text files that describe the packages and metadata available on PyPI. Package managers request (along with the packages) the metadata on PyPI to verify the authenticity of packages before they are installed. The changes to PyPI and tools will be minimal by leveraging a library, The Update Framework <https://github.com/theupdateframework/tuf>, that generates and transparently validates the relevant metadata. The first stage of the proposal (PEP 458 <http://legacy.python.org/dev/peps/pep-0458/>) uses a basic security model that supports verification of PyPI packages signed with cryptographic keys stored on PyPI, requires no action from developers and end users, and protects against malicious CDNs and public mirrors. To support continuous delivery of uploaded packages, PyPI administrators sign for uploaded packages with an online key stored on PyPI infrastructure. This level of security prevents packages from being accidentally or deliberately tampered with by a mirror or a CDN because the mirror or CDN will not have any of the keys required to sign for projects. The second stage of the proposal (PEP 480 <http://legacy.python.org/dev/peps/pep-0480/>) is an extension to the basic security model (discussed in PEP 458) that supports end-to-end verification of signed packages. End-to-end signing allows both PyPI and developers to sign for the packages that are downloaded by end users. If the PyPI infrastructure were to be compromised, attackers would be unable to serve malicious versions of these packages without access to the project's developer key. As in PEP 458, no additional action is required by end users. However, PyPI administrators will need to periodically (perhaps every few months) sign metadata with an offline key. PEP 480 also proposes an easy-to-use key management solution for developers, how to interface with a potential build farm on PyPI infrastructure, and discusses the security benefits of end-to-end signing. The second stage of the proposal simultaneously supports real-time project registration and developer signatures, and when configured to maximize security on PyPI, less than 1% of end users will be at risk even if an attacker controls PyPI and goes undetected for a month. We thank Nick Coghlan and Donald Stufft for their valuable contributions, and Giovanni Bajo and Anatoly Techtonik for their feedback. Thanks, PEP 458 & 480 authors.

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travis failures
by Robin Becker Feb. 11, 2020

Feb. 11, 2020

I have just seen all my manylinux builds fail at https://travis-ci.org/MrBitBucket/reportlab-mirror they all seem to fail in the multibuild install_run phase. I haven't altered anything related to .travis.yml since the previous run on Jan 17th. All the failures seem to relate to a cdn bucket the runs all end with something like this Looking in links: https://5cf40426d9f06eb7461d-6fe47d9331aba7cd62fc36c7196769e4.ssl.cf2.rackc… 1483Collecting pillow 1484 Downloading Pillow-6.2.2-cp27-cp27m-manylinux1_i686.whl (2.0 MB) 1485Installing collected packages: pillow 1486Successfully installed pillow-6.2.2 1487DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support 1488ERROR: You must give at least one requirement to install (maybe you meant "pip install https://5cf40426d9f06eb7461d-6fe47d9331aba7cd62fc36c7196769e4.ssl.cf2.rackc…"?) but I cannot find that in my .yml or the travis config file which I use. Any idea what could be causing this? -- Robin Becker

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"requirement" corner case
by Gordon Messmer Jan. 30, 2020

Jan. 30, 2020

I'm working on tools to convert python packaging data to rpm spec files. Most of the conversions are relatively straightforward, but there's an odd corner case with ">" and versions ending in ".*". That combination is parsed as a valid specification, but oddly, it seems to behave the same as ">= version", as demonstrated below. Is this intentional, or is it a byproduct of parsing ">1.0.*" as a LegacySpecifier? Should I convert ">1.0.*" into ">=1.0" and mimic the current behavior, or into something else, like "> 1.0", or ">= 1.1"? >>> pkg_resources._vendor.packaging.requirements.Requirement('cairocffi > 1.0.*,< 1.0.1').specifier._specs frozenset({<LegacySpecifier('>1.0.*')>, <Specifier('<1.0.1')>}) >>> '1.7' in pkg_resources.Requirement.parse('foo>1.7.*') True

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Virtualenv 20.0.0 beta1 is available
by Bernat Gabor Jan. 28, 2020

Jan. 28, 2020

More information available at https://discuss.python.org/t/virtualenv-20-0-0-beta1-is-available/3077

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pip 20.0 release!
by Pradyun Gedam Jan. 21, 2020

Jan. 21, 2020

Hello everyone! On behalf of the PyPA, I am pleased to announce that pip 20.0 has been released. This release contains quite a lot of changes (you can see the full list here <https://pip.pypa.io/en/stable/news/>). The highlights for this release are: - Shorter filenames in output, when installing from PyPI. - Automatic fall back to user installs, when main site-packages directory is not writable and user installs are allowed. - Significantly improved wheel building and wheel caching. - Significantly reworked PEP 425 (binary compatibility tag) computation. - Better handling of system packages in virtual environments created with `venv` (PEP 405). - Older pip entry points have been reinstated temporarily, to aid users with stale wrapper scripts. We expect that upgrading to this version of pip, would be painless for most users. We recommend that users test the release before deploying in production, as with any other software release. The pip development team is extremely grateful to everyone in the community for their contributions. Thanks to everyone who put so much effort into the new release. Many of the contributions came from community members, whether in the form of code, participation in design discussions and/or bug reports. Cheers, Pradyun

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localization, accessibility, & security progress on PyPI
by Sumana Harihareswara Jan. 17, 2020

Jan. 17, 2020

I've just posted a final progress report on Discourse about the last month of Open Tech Fund-supported progress on PyPI's localization and accessibility features. Including a screenshot and a bar graph! https://discuss.python.org/t/pypi-localization-accessibility-progress/2284/4 We've finished our OTF-funded accessibility & internationalization work. And sometime this month people will be able to use PyPI in Brazilian Portugese and Japanese! -- Sumana Harihareswara PyPI project manager Changeset Consulting https://changeset.nyc

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Deal with pip setup.py name and rpm packaging
by Marco Favero Jan. 15, 2020

Jan. 15, 2020

Hello, recently I started to develop a tool in python. I discovered pip and setuptool with setup.py. It's fantastic! I can provide packaging to pypi and to rpm all in a row. I follow these guidelines: - https://packaging.python.org/tutorials/packaging-projects/#generating-distr… - https://docs.python.org/3/distutils/builtdist.html?highlight=rpm - https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/ With %{?python_enable_dependency_generator} the RPM provides the dependecies itself. Fantastic! But how to force the developers to use consistent names? :D For instance these python-magic and redis client packages: https://pypi.org/project/python-magic https://pypi.org/project/redis/ use names which conflict with already existent rpm packages names. In particular, "redis" in rpm is the name of the Redis server package! If I make "bdist_rpm" of python Redis client and I "yum install" the package I damage my system deleting the Redis server! The Redis client developer says that he can't change the name because this will break existent installations: https://github.com/andymccurdy/redis-py/pull/385 I think this is not a good situation. Python environment should help to improve an "inconsistent" setup. As a result, I have to make bdist_rpm of the dependencies, then I have to install the source rpm, change the name in SPEC file and rebuild the rpm package. In my package I can't use %{?python_enable_dependency_generator}, because it uses the fault pypi names, I have to provide them myself. :( Thank you for reading this noise Have a fantastic python day Marco

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