…ecation (#214)

* feat: deprecate ParameterSet camelCase Parameter accessors

addParameter, newParameter and removeParameter were the public spelling
of RecipeOrganizer's private _add_parameter/_new_parameter/
_remove_parameter, exposed as bare class-level aliases. Point the
snake_case names at those aliases instead and add forwarding
@deprecated shims for the camelCase names, matching how
addParameterSet and removeParameterSet were handled in the same file.

Internal callers in fitbase, pdf, sas and structure move to the new
names so core no longer warns at itself.

BaseSpaceGroupParameters.addParameter in structure/sgconstraints.py is
deliberately untouched: it is a RecipeContainer, not a ParameterSet, so
it neither inherits nor reaches these accessors, and renaming it
belongs with the rest of the structure subpackage renames.

This unblocks the structure and sas subpackage renames, which could not
move off addParameter while it was core's only public spelling.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* change test format

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Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

* feat: deprecate getValue in favour of get_value

getValue was the last camelCase half of the value accessor pair; its
partner setValue was renamed in c4c0b10 and shipped in 3.3.0. Follow
that commit's shape: rename outright through the internal machinery
(LiteralABC, Literal, Argument, Operator, ParameterProxy,
ParameterAdapter) and all internal call sites, and add a forwarding
@deprecated shim on the user-facing class.

Unlike setValue, getValue is reachable on the Operator side of the
hierarchy too, so the shim goes on Literal as well as on Parameter.
Parameter's overrides Literal's, so Parameter users get a message
naming Parameter.get_value and everyone else gets one naming
Literal.get_value. Argument, Operator, Equation, ParameterProxy and
ParameterAdapter all keep accepting getValue.

This unblocks the structure and sas subpackage renames, which could not
rename their getValue overrides while core still dispatched on the old
name.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* clean up testing architecture to be more readable

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Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

Fix the SASProfile set_observed_profile override that core no longer
called, remove the undeclared six dependency and its Python 2 branches,
and load test_fitrecipe data with ProfileParser instead of PDFParser.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

* fix: fail tests when srfit calls its own deprecated API

Add a pytest filterwarnings rule that turns DeprecationWarnings raised by
srfit's own source into errors, and fix the two internal calls it caught:
FitRecipe.__init__ (pushFitHook) and initializeRecipe (resultsDictionary).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* add note about removing private function

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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

* feat: export the fitbase API from diffpy.srfit

Re-export the public fitbase classes so `from diffpy.srfit import
FitRecipe` works, and use the shorter import in the tests and core
examples. Import pyplot lazily in plot_recipe and apply the bg-style
stylesheet only to srfit's own figures, so importing srfit is faster and
no longer changes the user's global matplotlib style.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix imports from merge of main

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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Deprecate nine camelCase util names in favour of snake_case (observer,
tag, name, input and sort-key helpers) and switch all internal callers.
Restyle the tagmanager and weakrefcallable tests, add tests for the
untested util modules, put the deprecation tests under tests/deprecated,
and rewrite the util docstrings in NumPy style.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

…s for pytest (#221)

…` and update docstrings in `fitbase` (#222)

* update docstrings to numpy standard and refactor unittests for pytest

* move deprecation tests to separate deprecated directory

…eringfactortable` (#225)

* fix: replace deprecated setScatteringFactorTableByType in BasePDFGenerator

diffpy.srreal deprecates setScatteringFactorTableByType in favor of
assigning the scatteringfactortable property, which accepts the same
type strings. Add tests for setScatteringType covering X, N, E, a
registered long name and an unknown type.

Closes #137

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* test: remove the setScatteringType tests

Keep only the update of the reference calculation in testGenerator.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

The badge referenced matrix-and-codecov-on-merge-to-main.yml, which no
longer exists. Also add the missing .rst extension to
news/use-string-in-structure.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

…luated (#226)

* fix: constraints and soft bounds can now be added after the recipe is evaluated

* empty commit for stalled codecov

…unds (#227)

* fix warnings being raised during testing

* chore: news

…#229)

….py` (#230)

* chore: replace deprecated functions

* replace deprecated function in test

* fix deprecated functions in examples and add tests for interface

* fix file header

* trigger ci

* doc: add short hand operators to docs

* fix test to use pathlib

* news