Update packaging to use more modern python practices

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.6, 3.7, 3.8]
+        python-version: ['3.7', '3.8', '3.9', '3.10']
 
     steps:
     - name: Checkout

{{cookiecutter.github_project_name}}/MANIFEST.in

@@ -9,6 +9,7 @@ include {{ cookiecutter.npm_package_name }}.json
 
 include LICENSE
 include setup.py
+include setup.cfg
 include pyproject.toml
 include install.json
 

{{cookiecutter.github_project_name}}/README.md

@@ -1,10 +1,8 @@
-{{ cookiecutter.github_project_name }}
-===============================
+# {{ cookiecutter.github_project_name }}
 
 {{ cookiecutter.project_short_description }}
 
-Installation
-------------
+## Installation
 
 To install use pip:
 

{{cookiecutter.github_project_name}}/RELEASE.md

@@ -1,23 +1,53 @@
-- To release a new version of {{ cookiecutter.python_package_name  }} on PyPI:
+# Release
 
-Update _version.py (set release version, remove 'dev')
-git add the _version.py file and git commit
-`python setup.py sdist upload`
-`python setup.py bdist_wheel upload`
-`git tag -a X.X.X -m 'comment'`
-Update _version.py (add 'dev' and increment minor)
-git add and git commit
-git push
-git push --tags
+Before doing a release, check to see if there are any outstanding changes or untracked files:
 
-- To release a new version of {{ cookiecutter.npm_package_name }} on NPM:
+```
+git status
+git clean -fdxn
+```
 
-Update `js/package.json` with new npm package version
+Commit changes, and make sure that any untracked files can be deleted. Then clean the repository:
 
 ```
-# clean out the `dist` and `node_modules` directories
-git clean -fdx
-yarn
-yarn build:prod
-yarn publish
+git clean -fdx # actually delete untracked files
 ```
+
+## Javascript release
+
+To release a new version of {{ cookiecutter.npm_package_name }} on NPM, first register for an NPM account [here](https://www.npmjs.com/), then log in with `yarn login`. Then:
+
+1. Update `js/package.json` with the new npm package version
+2. Build and publish the npm package inside the `js/` directory:
+
+   ```
+   cd js/
+   yarn install
+   yarn publish
+   cd ..
+   ```
+
+## Python release
+
+To release a new version of {{ cookiecutter.python_package_name  }} on PyPI, first make sure that the `build` package is installed: `pip install build`.
+
+1. Update `{{ cookiecutter.python_package_name  }}/_version.py`:
+   - Update `__version__`
+   - Update `NPM_PACKAGE_RANGE` if necessary
+2. Commit changes to `_version.py` and tag the release
+   ```
+   git add {{ cookiecutter.python_package_name  }}/_version.py
+   git tag -a X.X.X -m 'comment'
+   ```
+3. Generate Python packages and upload to PyPI:
+   ```
+   python -m build
+   twine check dist/*
+   twine upload dist/*
+   ```
+4. Update `_version.py` (add 'dev' and increment minor)
+   ```
+   git commit -a -m 'Back to dev'
+   git push
+   git push --tags
+   ```

{{cookiecutter.github_project_name}}/js/package.json

@@ -3,6 +3,7 @@
   "version": "{{ cookiecutter.npm_package_version }}",
   "description": "{{ cookiecutter.project_short_description }}",
   "author": "{{ cookiecutter.author_name }}",
+  "license": "BSD-3-Clause",
   "main": "lib/index.js",
   "repository": {
     "type": "git",
@@ -35,7 +36,7 @@
     "rimraf": "^2.6.1"
   },
   "dependencies": {
-    "@jupyter-widgets/base": "^1.1 || ^2 || ^3 || ^4",
+    "@jupyter-widgets/base": "^1.1 || ^2 || ^3 || ^4 || ^6",
     "lodash": "^4.17.4"
   },
   "jupyterlab": {

{{cookiecutter.github_project_name}}/pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
-requires = ["jupyter_packaging~=0.7.9", "jupyterlab>=3.0.0,==3.*", "setuptools>=40.8.0", "wheel"]
+requires = ["jupyter_packaging~=0.7.9", "jupyterlab~=3.0", "setuptools>=40.8.0", "wheel"]
 build-backend = "setuptools.build_meta"

{{cookiecutter.github_project_name}}/setup.cfg

@@ -1,2 +1,35 @@
-[bdist_wheel]
-universal=1
+[metadata]
+name = {{ cookiecutter.python_package_name  }}
+author = {{ cookiecutter.author_name }}
+author_email={{ cookiecutter.author_email }}
+version = attr: {{ cookiecutter.python_package_name  }}._version.__version__
+description = {{ cookiecutter.project_short_description }}
+long_description = file: README.md
+long_description_content_type = text/markdown
+url = https://github.com/{{ cookiecutter.github_organization_name  }}/{{ cookiecutter.github_project_name }}
+keywords = ipython, widgets, Jupyter, JupyterLab, JupyterLab3
+license = BSD 3-Clause License
+classifiers =
+    License :: OSI Approved :: BSD License
+    Development Status :: 4 - Beta
+    Framework :: IPython
+    Intended Audience :: Developers
+    Intended Audience :: Science/Research
+    Programming Language :: Python
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Framework :: Jupyter
+    Framework :: Jupyter :: JupyterLab
+    Framework :: Jupyter :: JupyterLab :: 3
+    Framework :: Jupyter :: JupyterLab :: Extensions
+    Framework :: Jupyter :: JupyterLab :: Extensions :: Prebuilt
+
+[options]
+zip_safe = False
+include_package_data = True
+packages = find:
+install_requires =
+    ipywidgets>=7.6.0,<9
+python_requires = >=3.7

{{cookiecutter.github_project_name}}/setup.py

@@ -1,32 +1,17 @@
-from __future__ import print_function
-from setuptools import setup, find_packages
-import os
-from os.path import join as pjoin
-from distutils import log
+from setuptools import setup
+from pathlib import Path
 
 from jupyter_packaging import (
     create_cmdclass,
     install_npm,
     ensure_targets,
     combine_commands,
-    get_version,
 )
 
-
-here = os.path.dirname(os.path.abspath(__file__))
-
-name = '{{ cookiecutter.python_package_name  }}'
-LONG_DESCRIPTION = '{{ cookiecutter.project_short_description }}'
-
-# Get {{ cookiecutter.python_package_name  }} version
-version = get_version(pjoin(name, '_version.py'))
-
-js_dir = pjoin(here, 'js')
+JS_DIR = Path(__file__).resolve().parent / 'js'
 
 # Representative files that should exist after a successful build
-jstargets = [
-    pjoin(js_dir, 'dist', 'index.js'),
-]
+jstargets = [JS_DIR / 'dist' / 'index.js']
 
 data_files_spec = [
     ('share/jupyter/nbextensions/{{ cookiecutter.npm_package_name }}', '{{ cookiecutter.python_package_name }}/nbextension', '*.*'),
@@ -37,40 +22,9 @@
 
 cmdclass = create_cmdclass('jsdeps', data_files_spec=data_files_spec)
 cmdclass['jsdeps'] = combine_commands(
-    install_npm(js_dir, npm=['yarn'], build_cmd='build:prod'), ensure_targets(jstargets),
-)
-
-setup_args = dict(
-    name=name,
-    version=version,
-    description='{{ cookiecutter.project_short_description }}',
-    long_description=LONG_DESCRIPTION,
-    include_package_data=True,
-    install_requires=[
-        'ipywidgets>=7.6.0',
-    ],
-    packages=find_packages(),
-    zip_safe=False,
-    cmdclass=cmdclass,
-    author='{{ cookiecutter.author_name }}',
-    author_email='{{ cookiecutter.author_email }}',
-    url='https://github.com/{{ cookiecutter.github_organization_name  }}/{{ cookiecutter.github_project_name }}',
-    keywords=[
-        'ipython',
-        'jupyter',
-        'widgets',
-    ],
-    classifiers=[
-        'Development Status :: 4 - Beta',
-        'Framework :: IPython',
-        'Intended Audience :: Developers',
-        'Intended Audience :: Science/Research',
-        'Topic :: Multimedia :: Graphics',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
-    ],
+    install_npm(JS_DIR, npm=['yarn'], build_cmd='build:prod'),
+    ensure_targets(jstargets),
 )
 
-setup(**setup_args)
+# See setup.cfg for other parameters
+setup(cmdclass=cmdclass)

{{cookiecutter.github_project_name}}/{{cookiecutter.python_package_name}}/__init__.py

@@ -1,4 +1,4 @@
-from ._version import version_info, __version__
+from ._version import __version__
 
 from .example import *
 

{{cookiecutter.github_project_name}}/{{cookiecutter.python_package_name}}/_version.py

@@ -1,9 +1,4 @@
 # Module version
-version_info = (0, 1, 0, 'alpha', 0)
+__version__ = '0.1.0a0'
 
-# Module version stage suffix map
-_specifier_ = {'alpha': 'a', 'beta': 'b', 'candidate': 'rc', 'final': ''}
-
-# Module version accessible using {{ cookiecutter.python_package_name }}.__version__
-__version__ = '%s.%s.%s%s'%(version_info[0], version_info[1], version_info[2],
-  '' if version_info[3]=='final' else _specifier_[version_info[3]]+str(version_info[4]))
+NPM_PACKAGE_RANGE='^{{ cookiecutter.npm_package_version }}'

{{cookiecutter.github_project_name}}/{{cookiecutter.python_package_name}}/example.py

@@ -1,5 +1,6 @@
 import ipywidgets as widgets
 from traitlets import Unicode
+from ._version import NPM_PACKAGE_RANGE
 
 # See js/lib/example.js for the frontend counterpart to this file.
 
@@ -20,9 +21,9 @@ class HelloWorld(widgets.DOMWidget):
     _model_module = Unicode('{{ cookiecutter.npm_package_name }}').tag(sync=True)
 
     # Version of the front-end module containing widget view
-    _view_module_version = Unicode('^{{ cookiecutter.npm_package_version }}').tag(sync=True)
+    _view_module_version = Unicode(NPM_PACKAGE_RANGE).tag(sync=True)
     # Version of the front-end module containing widget model
-    _model_module_version = Unicode('^{{ cookiecutter.npm_package_version }}').tag(sync=True)
+    _model_module_version = Unicode(NPM_PACKAGE_RANGE).tag(sync=True)
 
     # Widget specific property.
     # Widget properties are defined as traitlets. Any property tagged with `sync=True`