Errors and warnings

[microprediction]

Just wondering aloud if these errors, which I believe ultimately come from seriate, could be obviated. I'll try to put together reproducible example but perhaps this is already known to you?

    E   TypeError: Descriptors cannot not be created directly.
    E   If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc >= 3.19.0.
    E   If you cannot immediately regenerate your protos, some other possible workarounds are:
    E    1. Downgrade the protobuf package to 3.20.x or lower.
    E    2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
    E   
    E   More information: https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates

[vmarkovtsev]

Hey, thanks for testing the library. No, I haven't seen this yet. Can you reproduce it in a Dockerfile?

[microprediction]

Will do. In the meantime here's a longer trace below from my
github action tests.

This certainly isn't a minimalist example I apologize (it is this test) that eventually calls

   from seriate import seriate



    ============================= test session starts ==============================
    platform linux -- Python 3.7.13, pytest-7.1.2, pluggy-1.0.0
    rootdir: /home/runner/work/precise/precise
    collected 27 items / 20 errors
    
    ==================================== ERRORS ====================================
    _____________ ERROR collecting tests/test_examples_basic_usage.py ______________
    tests/test_examples_basic_usage.py:1: in <module>
        from precise.skaters.covarianceutil.covfunctions import cov_to_corrcoef
    precise/__init__.py:1: in <module>
        from precise.skatertools.m6.competition import m6_competition_entry
    precise/skatertools/m6/competition.py:3: in <module>
        from precise.skaters.portfoliostatic.allstaticport import random_port, PORT
    precise/skaters/portfoliostatic/allstaticport.py:4: in <module>
        from precise.skaters.portfoliostatic.hrpport import HRP_LONG_PORT, HRP_LS_PORT
    precise/skaters/portfoliostatic/hrpport.py:4: in <module>
        from precise.skaters.portfoliostatic.hrpportfactory import hierarchical_risk_parity_portfolio_factory
    precise/skaters/portfoliostatic/hrpportfactory.py:1: in <module>
        from precise.skaters.portfoliostatic.schurportfactory import hierarchical_seriation_portfolio_factory
    precise/skaters/portfoliostatic/schurportfactory.py:10: in <module>
        from seriate import seriate
    /opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/seriate.py:6: in <module>
        from ortools.constraint_solver import pywrapcp, routing_enums_pb2
    /opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/ortools/constraint_solver/routing_enums_pb2.py:3[8](https://github.com/microprediction/precise/runs/6699435043?check_suite_focus=true#step:7:9): in <module>
        create_key=_descriptor._internal_create_key),
    /opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/google/protobuf/descriptor.py:755: in __new__
        _message.Message._CheckCalledFromGeneratedFile()
    E   TypeError: Descriptors cannot not be created directly.
    E   If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc >= 3.1[9](https://github.com/microprediction/precise/runs/6699435043?check_suite_focus=true#step:7:10).0.
    E   If you cannot immediately regenerate your protos, some other possible workarounds are:
    E    1. Downgrade the protobuf package to 3.[20](https://github.com/microprediction/precise/runs/6699435043?check_suite_focus=true#step:7:21).x or lower.
    E    2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
    E   
    E   More information: https://developers.google.com/protocol-buffers/docs/news/20[22](https://github.com/microprediction/precise/runs/6699435043?check_suite_focus=true#step:7:23)-05-06#python-updates

[microprediction]

Ah okay getting to the bottom of this.

   ortools 7.8.7959 requires protobuf>=3.12.2

But the current version of protobuf (we're into the 4.x as I write) won't work. I tested a few and seriate seems to work fine up to about 3.20.1

I would suggest that

    3.12.2<=protobuf<=3.20.1

is a requirement for seriate at the moment. Of course, I'd love it if you supported ortools 8 and then this could be relaxed.