Black format checker (#1311)

* black checker

* Simplified

* add examples to black format check

Co-authored-by: Matthias Feurer <[email protected]>

Author: eddiebergman

.github/workflows/black_checker.yml

@@ -0,0 +1,31 @@
+name: black-format-check
+
+on: [push, pull_request]
+
+env:
+  #If STRICT is set to true, it will fail on black check fail
+  STRICT: false
+
+jobs:
+
+  black-format-check:
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup Python 3.7
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.7"
+
+    - name: Install black
+      run: |
+        pip install black
+
+    - name: Run Black Check
+      run: |
+        black --check --diff --line-length 100 ./autosklearn || ! $STRICT
+        black --check --diff --line-length 100 ./test || ! $STRICT
+        black --check --diff --line-length 100 ./examples|| ! $STRICT