pre-commit: add autoflake hook, use dedicated .flake8 config, detail tweaks to RELEASE.md

.flake8

@@ -0,0 +1,11 @@
+# flake8 is used for linting Python code setup to automatically run with
+# pre-commit.
+#
+# ref: https://flake8.pycqa.org/en/latest/user/configuration.html
+#
+[flake8]
+# E: style errors
+# W: style warnings
+# C: complexity
+# D: docstring warnings (unused pydocstyle extension)
+ignore = E, C, W, D

.pre-commit-config.yaml

@@ -15,7 +15,15 @@ repos:
     hooks:
       - id: pyupgrade
         args:
-          - --py37-plus
+          - --py38-plus
+
+  # Autoformat: Python code
+  - repo: https://github.com/PyCQA/autoflake
+    rev: v2.0.2
+    hooks:
+      - id: autoflake
+        args:
+          - --in-place
 
   # Autoformat: Python code
   - repo: https://github.com/pycqa/isort
@@ -49,15 +57,6 @@ repos:
     rev: "6.0.0"
     hooks:
       - id: flake8
-        # Ignore style and complexity
-        # E: style errors
-        # W: style warnings
-        # C: complexity
-        #
-        args:
-          - --ignore=E,C,W
-          - --builtins=c
-          - --exclude=__init__.py
 
 # pre-commit.ci config reference: https://pre-commit.ci/#configuration
 ci:

RELEASE.md

@@ -1,16 +1,15 @@
 # How to make a release
 
-`simpervisor` is a package available on [PyPI][] and [conda-forge][].
+`simpervisor` is a package available on [PyPI] and [conda-forge].
 These are instructions on how to make a release.
 
 ## Pre-requisites
 
-- Push rights to [github.com/jupyterhub/simpervisor][]
-- Push rights to [conda-forge/simpervisor-feedstock][]
+- Push rights to [github.com/jupyterhub/simpervisor]
 
 ## Steps to make a release
 
-1. Create a PR updating `CHANGELOG.md` with [github-activity][] and continue
+1. Create a PR updating `CHANGELOG.md` with [github-activity] and continue
    only when its merged.
 
 1. Checkout main and make sure it is up to date.
@@ -31,16 +30,18 @@ These are instructions on how to make a release.
    tbump ${VERSION}
    ```
 
-   Following this, the [CI system][] will build and publishe a release.
+   Following this, the [CI system] will build and publishe a release.
 
 1. Reset the version back to dev, e.g. `1.0.1.dev` after releasing `1.0.0`.
 
    ```shell
    tbump --no-tag ${NEXT_VERSION}.dev
    ```
 
-1. Following the release to PyPI, an automated PR should arrive to
-   [conda-forge/simpervisor-feedstock][] with instructions.
+1. Following the release to PyPI, an automated PR should arrive within 24 hours
+   to [conda-forge/simpervisor-feedstock] with instructions on releasing to
+   conda-forge. You are welcome to volunteer doing this, but aren't required as
+   part of making this release to PyPI.
 
 [github-activity]: https://github.com/executablebooks/github-activity
 [github.com/jupyterhub/simpervisor]: https://github.com/jupyterhub/simpervisor

pyproject.toml

@@ -63,6 +63,17 @@ addopts = "--verbose --color=yes --durations=10"
 asyncio_mode = "auto"
 
 
+# autoflake is used for autoformatting Python code
+#
+# ref: https://github.com/PyCQA/autoflake#readme
+#
+[tool.autoflake]
+ignore-init-module-imports = true
+remove-all-unused-imports = true
+remove-duplicate-keys = true
+remove-unused-variables = true
+
+
 # black is used for autoformatting Python code
 #
 # ref: https://black.readthedocs.io/en/stable/

simpervisor/__init__.py

@@ -1,2 +1,2 @@
-from ._version import __version__
-from .process import KilledProcessError, SupervisedProcess
+from ._version import __version__  # noqa
+from .process import KilledProcessError, SupervisedProcess  # noqa

simpervisor/process.py

@@ -16,8 +16,6 @@ class KilledProcessError(Exception):
     Each SupervisedProcess can be killed only once.
     """
 
-    pass
-
 
 class SupervisedProcess:
     def __init__(