Add pre-commit that strips out cells (#226)

Author: jsignell

.github/workflows/pre-commit.yml

@@ -0,0 +1,18 @@
+name: Linting
+
+on:
+  push:
+    branches: main
+  pull_request:
+    branches: main
+
+jobs:
+  checks:
+    name: "pre-commit hooks"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: "3.9"
+      - uses: pre-commit/[email protected]

.pre-commit-config.yaml

@@ -0,0 +1,12 @@
+repos:
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v2.31.0
+    hooks:
+      - id: pyupgrade
+        args:
+          - --py38-plus
+  - repo: https://github.com/kynan/nbstripout
+    rev: 0.6.0
+    hooks:
+      - id: nbstripout
+

conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # Configuration file for the Sphinx documentation builder.
 #

machine-learning/tutorial_helper.py

@@ -64,7 +64,7 @@ def train_model(model, criterion, optimizer, scheduler, num_epochs=25):
     best_acc = 0.0
 
     for epoch in range(num_epochs):
-        print('Epoch {}/{}'.format(epoch, num_epochs - 1))
+        print(f'Epoch {epoch}/{num_epochs - 1}')
         print('-' * 10)
 
         # Each epoch has a training and validation phase
@@ -119,7 +119,7 @@ def train_model(model, criterion, optimizer, scheduler, num_epochs=25):
     time_elapsed = time.time() - since
     print('Training complete in {:.0f}m {:.0f}s'.format(
         time_elapsed // 60, time_elapsed % 60))
-    print('Best val Acc: {:4f}'.format(best_acc))
+    print(f'Best val Acc: {best_acc:4f}')
 
     # load best model weights
     model.load_state_dict(best_model_wts)
@@ -154,7 +154,7 @@ def visualize_model(model, num_images=6):
     fig, axes = plt.subplots(ncols=2, nrows=images_so_far // 2,
                              figsize=(12, 12))
     for img, pred, ax in zip(images, predictions, axes.ravel()):
-        imshow(img, title="Predicted: {}".format(pred), ax=ax)
+        imshow(img, title=f"Predicted: {pred}", ax=ax)
 
     plt.tight_layout()
     return axes

sql.ipynb

@@ -12,9 +12,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "scrolled": true
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "! pip install dask-sql"