pre-commit maintenance (#156)

* use the version of isort from the pycqa

* use `flake8`'s github repository

* upgrade `flake8`

* use `black` on notebooks

* black

* configure pre-commit.ci

* [skip-ci]

Author: keewis

.pre-commit-config.yaml

@@ -1,3 +1,6 @@
+ci:
+  autoupdate_schedule: weekly
+
 # https://pre-commit.com/
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
@@ -8,7 +11,7 @@ repos:
       - id: check-docstring-first
       - id: check-yaml
   # isort should run before black as black sometimes tweaks the isort output
-  - repo: https://github.com/timothycrosley/isort
+  - repo: https://github.com/pycqa/isort
     rev: 5.10.1
     hooks:
       - id: isort
@@ -17,11 +20,12 @@ repos:
     rev: 22.1.0
     hooks:
       - id: black
+      - id: black-jupyter
   - repo: https://github.com/keewis/blackdoc
     rev: v0.3.4
     hooks:
       - id: blackdoc
-  - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.2
+  - repo: https://github.com/pycqa/flake8
+    rev: 4.0.1
     hooks:
       - id: flake8

docs/examples/plotting.ipynb

@@ -16,6 +16,7 @@
    "outputs": [],
    "source": [
     "import xarray as xr\n",
+    "\n",
     "# to be able to read unit attributes following the CF conventions\n",
     "import cf_xarray.units  # must be imported before pint_xarray\n",
     "import pint_xarray\n",
@@ -88,12 +89,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "monthly_means = (\n",
-    "    quantified\n",
-    "    .pint.to(\"degC\")\n",
-    "    .sel(time=\"2013\")\n",
-    "    .groupby(\"time.month\").mean()\n",
-    ")\n",
+    "monthly_means = quantified.pint.to(\"degC\").sel(time=\"2013\").groupby(\"time.month\").mean()\n",
     "monthly_means"
    ]
   },