Add style and format checking

.flake8

@@ -0,0 +1,12 @@
+[flake8]
+max-line-length = 100
+exclude = .venv
+ignore =
+    # disable, whitespace before ':' https://github.com/TCLResearchEurope/ctw-pre-commit-hooks/issues/3
+    E203,
+    # disable "too many leading '#' for block comment"
+    E266,
+    # disable "line break before binary operator" which clashes with black
+    W503,
+    # disable "invalid escape sequence"
+    W605,

.github/workflows/ci.yml

@@ -18,6 +18,15 @@ jobs:
         run: |
           pip install -r requirements.txt -r requirements-dev.txt -r requirements-test.txt
 
+      - name: Check format with black
+        run: black --check --extend-exclude tests .
+
+      - name: Check style with flake8
+        run: flake8 --extend-exclude tests .
+
+      - name: Check import sorting with isort
+        run: isort --check --extend-skip tests .
+
       - name: Run model tests
         run: make model-test
 

challenge/__init__.py

@@ -1,3 +1,3 @@
 from challenge.api import app
 
-application = app
+application = app