Drop Python 3.7 support, and remove references to beta

.circleci/config.yml

@@ -3,7 +3,6 @@ workflows:
   version: 2
   test:
     jobs:
-      - test-37
       - test-38
       - test-39
       - test-310
@@ -12,9 +11,9 @@ workflows:
     jobs:
       - docs
 jobs:
-  test-37: &test-template
+  test-38: &test-template
     docker:
-      - image: cimg/python:3.7
+      - image: cimg/python:3.8
     steps:
       - checkout
       - restore_cache:
@@ -37,7 +36,7 @@ jobs:
             mkdir test-reports
             pytest --junitxml=test-reports/junit.xml --flake8 --cov --cov-report=xml:test-reports/coverage.xml stonesoup
       - store_test_results:
-          path: test-reports
+          path: test-reports/junit.xml
       - store_artifacts:
           path: test-reports 
       - run:
@@ -47,10 +46,6 @@ jobs:
               -f test-reports/coverage.xml \
               -F unittests \
               -n ${CIRCLE_BUILD_NUM}
-  test-38:
-    <<: *test-template
-    docker:
-      - image: cimg/python:3.8
   test-39:
     <<: *test-template
     docker:
@@ -86,13 +81,13 @@ jobs:
           name: Build Docs
           command: |
             . venv/bin/activate
-            coverage run -m sphinx -b html -W --keep-going -D sphinx_gallery_conf.junit=../../../test-reports/sphinx-gallery/junit.xml docs/source docs/build/html
+            coverage run -m sphinx -b html -d build/.doctrees -W --keep-going -D sphinx_gallery_conf.junit=../../../test-reports/sphinx-gallery/junit.xml docs/source docs/build/html
             coverage xml -o test-reports/coverage.xml
       - store_artifacts:
           path: docs/build/html
           destination: docs
       - store_test_results:
-          path: test-reports
+          path: test-reports/sphinx-gallery/junit.xml
       - store_artifacts:
           path: test-reports
       - run:

README.md

@@ -15,8 +15,6 @@ estimation algorithms.
 
 An article is [available](https://www.gov.uk/government/news/dstl-shares-new-open-source-framework-initiative) that details the background to the project, and contains links to sample data.
 
-Stone Soup is currently in *beta*.
-
 Please see the
 [Stone Soup documentation](https://stonesoup.readthedocs.org/) for more
 information.
@@ -31,7 +29,7 @@ Stone Soup uses the following dependencies:
 
 | Name | License |
 | ---- | ------- |
-| [Python](https://www.python.org/) (v3.7+) | PSFL |
+| [Python](https://www.python.org/) (v3.8+) | PSFL |
 | [numpy](https://numpy.org/) | BSD |
 | [SciPy](https://www.scipy.org/) | BSD |
 | [matplotlib](https://matplotlib.org/) | [PSF/BSD-compatible](https://matplotlib.org/users/license.html) |

docs/source/index.rst

@@ -15,9 +15,8 @@ components may not be the most optimised implementations, instead focusing on
 being flexible. Its also intended to aid choice of component/algorithms
 to tackle real world problems.
 
-Stone Soup is currently in *beta* and under continuing development, where
-feedback and contributions are welcomed to improve the component interface
-design and grow the number components available.
+Stone Soup is under active development, where feedback and contributions are
+welcomed to grow the number of components and features available.
 
 Please see the Stone Soup :ref:`auto_tutorials/index:Tutorials` for learning
 about tracking and using Stone Soup, :ref:`auto_examples/index:Examples` for
@@ -42,7 +41,7 @@ To install Stone Soup from Conda-Forge with ``conda``:
     conda config --add channels conda-forge
     conda install stonesoup
 
-Stone Soup is currently in active development under *beta*. To install
+Stone Soup is currently in active development. To install
 the latest version from the GitHub repository:
 
 .. code::

setup.cfg

@@ -8,15 +8,15 @@ maintainer_email = [email protected]
 url = https://github.com/dstl/Stone-Soup
 license = MIT
 classifiers =
-    Development Status :: 4 - Beta
+    Development Status :: 5 - Production/Stable
     Intended Audience :: Science/Research
     License :: OSI Approved :: MIT License
     Operating System :: OS Independent
     Programming Language :: Python :: 3 :: Only
     Topic :: Scientific/Engineering
 
 [options]
-python_requires = >=3.7
+python_requires = >=3.8
 packages = find:
 install_requires =
     matplotlib

stonesoup/base.py

@@ -59,10 +59,9 @@ def __init__(self, foo, bar=bar.default, *args, **kwargs):
 from abc import ABCMeta
 from collections import OrderedDict
 from copy import copy
+from functools import cached_property
 from types import MappingProxyType
 
-from ._util import cached_property
-
 
 class Property:
     """Property(cls, default=inspect.Parameter.empty)