chore: add black dependencies to the build

.gitignore

@@ -30,6 +30,7 @@ zookeeper/
 .project
 .pydevproject
 .tox
+venv
 /.settings
 /.metadata
 

constraints.txt

@@ -1,4 +1,5 @@
 # Consistent testing environment.
+black==22.10.0
 coverage==6.3.2
 flake8==3.9.2
 mock==3.0.5

pyproject.toml

@@ -3,3 +3,19 @@ build-backend = 'setuptools.build_meta'
 requires = [
     'setuptools >= 46.4.0',
 ]
+
+[tool.black]
+line-length = 79
+target-version = ['py37', 'py38', 'py39', 'py310']
+include = '\.pyi?$'
+# 'extend-exclude' excludes files or directories in addition to the defaults
+# A regex preceded with ^/ will apply only to files and directories
+# in the root of the project.
+# (
+#   ^/foo.py     # exclude a file named foo.py in the root of the project.
+#   | .*_pb2.py  # exclude autogenerated Protocol Buffer files anywhere in the
+# )
+#               # project.
+extend-exclude = '''
+'''
+

setup.cfg

@@ -8,7 +8,8 @@ description = "Higher Level Zookeeper Client"
 long_description = file: README.md, CHANGES.md
 long_description_content_type = text/markdown
 license = Apache 2.0
-license_file = LICENSE
+license_files =
+    LICENSE
 platform = any
 keywords = zookeeper, lock, leader, configuration
 classifiers =
@@ -95,3 +96,4 @@ exclude =
     build/,dist/,*egg,
     docs/conf.py,
     zookeeper/
+

tox.ini

@@ -5,8 +5,9 @@ requires=
     tox-wheel>=0.6.0
 skip_missing_interpreters=True
 envlist =
-    pep8,
-    {gevent,eventlet,sasl,docs},
+    pep8,black,
+    gevent,eventlet,sasl,
+    docs,
     pypy3
 isolated_build = true
 
@@ -42,9 +43,18 @@ commands =
 commands = - codecov -e TOX_VENV,ZOOKEEPER_VERSION
 
 [testenv:pep8]
-extra = alldeps
+basepython = python3
+extras = alldeps
 deps =
-    flake8==3.7.9
+    flake8
 usedevelop = True
 commands = flake8 {posargs} {toxinidir}/kazoo
 
+[testenv:black]
+basepython = python3
+extras =
+deps =
+    black
+usedevelop = True
+commands = black --check {posargs: {toxinidir}/kazoo {toxinidir}/kazoo}
+