Unstable doctest in hmm/chmm.pyx

[kliem]

Part of #32544:

sage -t --long --warn-long 42.1 --random-seed=30462179883676183063850454726642654182 src/sage/stats/hmm/chmm.pyx
**********************************************************************
File "src/sage/stats/hmm/chmm.pyx", line 136, in sage.stats.hmm.chmm.GaussianHiddenMarkovModel
Failed example:
    try:
        p, s = m.baum_welch(obs)
        assert p > log_likelihood
        assert (4 <= s < 200)
    except RuntimeError:
        pass
Exception raised:
    Traceback (most recent call last):
      File "/home/jonathan/Applications/sage/local/lib/python3.8/site-packages/sage/doctest/forker.py", line 694, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/home/jonathan/Applications/sage/local/lib/python3.8/site-packages/sage/doctest/forker.py", line 1088, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.stats.hmm.chmm.GaussianHiddenMarkovModel[12]>", line 4, in <module>
        assert (Integer(4) <= s < Integer(200))
    AssertionError
**********************************************************************
1 item had failures:
   1 of  15 in sage.stats.hmm.chmm.GaussianHiddenMarkovModel
    [119 tests, 1 failure, 0.53 s]

Depends on #32907

CC: @orlitzky

Component: doctest framework

Author: Michael Orlitzky

Branch/Commit: 657a861

Reviewer: Markus Wageringel

Issue created by migration from https://trac.sagemath.org/ticket/32890

[orlitzky]

comment:2

The return value s here is a number of iterations, and should probably lie between zero (or maybe one) and the max_iter of the baum_welch() method, inclusive.

[orlitzky]

Commit: 657a861

[orlitzky]

Last 10 new commits:

bb1f741	build/pkgs/singular/spkg-install.in: Remove workaround for make paralellization bugs
2673632	Port to API changes in singular 4.2.1p2
720d10e	Update tests for singular 4.2.1p2
cca353b	src/sage/rings/polynomial/hilbert.pyx: Fix doctest markup
8c6c949	build/pkgs/flint/: Add patch for threads with GCC < 4.9
eea6328	build/pkgs/singular/spkg-install.in: singular.hlp -> singular.info
a137b7e	Merge tag '9.5.beta8' into t/32907/update_singular_to_4_2_1p2
0856554	build/pkgs/singular: Update to 4.2.1p3
e1c448e	Merge commit '0856554' into develop
657a861	Trac #32890: fix a failing random doctest in sage.stats.hmm.chmm.

[orlitzky]

Author: Michael Orlitzky

[orlitzky]

Branch: u/mjo/ticket/32890

[mwageringel]

Dependencies: #32907

[mwageringel]

Reviewer: Markus Wageringel

[mwageringel]

comment:4

The last commit looks good to me. Let me add the dependency for completeness.

[vbraun]

Changed branch from u/mjo/ticket/32890 to 657a861