classy: update (fixes #305)

.travis.yml

@@ -99,7 +99,6 @@ before_install:
     python -m pip install --upgrade pip setuptools wheel;
     pip install mpi4py pytest-forked pytest-cov flaky matplotlib dill coverage flake8;
     fi
-  - pip install "Cython<3"
   - python --version
 
 script:

CHANGELOG.md

@@ -1,3 +1,11 @@
+## 3.4.X – YYYY-MM-DD
+
+### Cosmology
+
+#### CLASS
+
+- Min version update to 3.2.1 (solves #305; thanks to the CLASS developers)
+
 ## 3.4 – 2023-10-11
 
 ### General

cobaya/cosmo_input/input_database.py

@@ -178,10 +178,7 @@
                                            'ref': {'dist': 'norm', 'loc': 1.0416,
                                                    'scale': 0.0004},
                                            'proposal': 0.0002,
-                                           'latex': '100\\theta_\\mathrm{s}',
-                                           'drop': True}, '100*theta_s': {
-                               'value': 'lambda theta_s_100: theta_s_100',
-                               'derived': False},
+                                           'latex': '100\\theta_\\mathrm{s}'},
                            'H0': {'latex': 'H_0'}}}}},
     'sound_horizon_lensonly': {
         'desc': 'Angular size of the sound horizon (h>0.4; approximate, if using CAMB)',

cobaya/theories/classy/classy.py

@@ -164,10 +164,11 @@
 
    .. code:: bash
 
-      $ python -m pip install 'cython<3'
+      $ python -m pip install 'cython'
 
-   In particular the version restriction is due to `this issue
-   <https://github.com/lesgourg/class_public/issues/531>`_.
+   In particular, if working with a modified CLASS version based on a version previous
+   to v3.2.1, you need to change above ``'cython'`` by ``'cython<3'`` (see `this issue
+   <https://github.com/lesgourg/class_public/issues/531>`_).
 
 To download and install CLASS manually in a folder called ``CLASS`` under
 ``/path/to/cosmo``, simply do:
@@ -251,7 +252,7 @@ class classy(BoltzmannBase):
 
     # Name of the Class repo/folder and version to download
     _classy_repo_name = "lesgourg/class_public"
-    _min_classy_version = "v3.2.0"
+    _min_classy_version = "v3.2.1"
     _classy_min_gcc_version = "6.4"  # Lower ones are possible atm, but leak memory!
     _classy_repo_version = os.environ.get('CLASSY_REPO_VERSION', _min_classy_version)
 
@@ -638,9 +639,6 @@ def _get_derived_all(self, derived_requested=True):
             requested_and_extra["Omega_nu"] = self.classy.Omega_nu
         if "T_cmb" in requested_and_extra:
             requested_and_extra["T_cmb"] = self.classy.T_cmb()
-        if "theta_s_100" in requested_and_extra:
-            requested_and_extra["theta_s_100"] = \
-                self.classy.get_current_derived_parameters(["100*theta_s"])["100*theta_s"]
         # Get the rest using the general derived param getter
         # No need for error control: classy.get_current_derived_parameters is passed
         # every derived parameter not excluded before, and cause an error, indicating
@@ -770,7 +768,7 @@ def install(cls, path=None, code=True, no_progress_bars=False, **_kwargs):
         log.info("Installing pre-requisites...")
         # TODO: remove version restriction below when this issue is fixed:
         # https://github.com/lesgourg/class_public/issues/531
-        exit_status = pip_install("cython<3")
+        exit_status = pip_install("cython")
         if exit_status:
             log.error("Could not install pre-requisite: cython")
             return False

docs/src_examples/cosmo_basic/basic_classy.yaml

@@ -45,10 +45,6 @@ params:
       scale: 0.0004
     proposal: 0.0002
     latex: 100\theta_\mathrm{s}
-    drop: true
-  100*theta_s:
-    value: 'lambda theta_s_100: theta_s_100'
-    derived: false
   H0:
     latex: H_0
   omega_b: