downgrade black for py36

because otherwise you can't install redis
so don't do black linting on py36

Author: alexcjohnson

components/dash-core-components/package.json

@@ -15,7 +15,7 @@
     "private::format.black": "black dash_core_components_base/ tests/ setup.py",
     "private::format.eslint": "eslint src --fix",
     "private::format.prettier": "prettier --config .prettierrc --write src/**/*.js",
-    "private::lint.black": "black --check dash_core_components_base/ tests/ setup.py",
+    "private::lint.black": "if [[ ${PYVERSION:-python39} != python36 ]]; then black --check dash_core_components_base/ tests/ setup.py; fi",
     "private::lint.eslint": "eslint src",
     "private::lint.flake8": "flake8 --exclude=dash_core_components,node_modules,venv",
     "private::lint.prettier": "prettier --config .prettierrc src/**/*.js --list-different",

components/dash-table/package.json

@@ -23,7 +23,7 @@
     "private::format.black": "black dash_table_base tests",
     "private::lint.ts": "eslint ./src ./tests",
     "private::lint.flake": "flake8 dash_table_base tests",
-    "private::lint.black": "black --check dash_table_base tests",
+    "private::lint.black": "if [[ ${PYVERSION:-python39} != python36 ]]; then black --check dash_table_base tests; fi",
     "private::lint.prettier": "prettier --config .prettierrc \"{src,tests,demo}/**/*.{js,ts,tsx}\" --list-different",
     "private::test.python": "python -m unittest tests/unit/format_test.py",
     "private::test.unit": "karma start karma.conf.js --single-run",

package.json

@@ -7,7 +7,7 @@
     "private::initialize.renderer": "cd dash/dash-renderer && npm ci",
     "private::build.components": "python dash/development/update_components.py 'all'",
     "private::build.renderer": "cd dash/dash-renderer && renderer build",
-    "private::lint.black": "black dash tests --exclude metadata_test.py --check",
+    "private::lint.black": "if [[ ${PYVERSION:-python39} != python36 ]]; then black dash tests --exclude metadata_test.py --check; fi",
     "private::lint.flake8": "flake8 --exclude=metadata_test.py dash tests",
     "private::lint.pylint-dash": "PYLINTRC=${PYLINTRC:=.pylintrc39} && pylint dash setup.py --rcfile=$PYLINTRC",
     "private::lint.pylint-tests": "PYLINTRC=${PYLINTRC:=.pylintrc39} && pylint tests/unit tests/integration -d all --rcfile=$PYLINTRC",

requires-ci.txt

@@ -1,5 +1,6 @@
 # Dependencies used by CI on github.com/plotly/dash
-black==22.3.0
+black==22.3.0;python_version>="3.7"
+black==21.6b0;python_version<"3.7"
 dash-flow-example==0.0.5
 dash-dangerously-set-inner-html
 flake8==3.9.2