Set up ruff & black with pre-commit and document usage

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# Applied `ruff` and `black` (gh-64)
+1fec42d0baf90e00d510efd76cb6006fa0c70dc4

.github/workflows/check.yml

@@ -0,0 +1,26 @@
+name: "Check with pre-commit"
+on:
+  - "push"
+  - "pull_request"
+
+jobs:
+
+  check-with-pre-commit:
+    runs-on: "ubuntu-latest"
+    strategy:
+      matrix:
+        python-version: ["3.11"]
+
+    steps:
+      - uses: "actions/checkout@v3"
+
+      - name: "Set up Python ${{ matrix.python-version }}"
+        uses: "actions/setup-python@v4"
+        with:
+          python-version: "${{ matrix.python-version }}"
+
+      - name: "Install pre-commit"
+        run: "pip install pre-commit"
+
+      - name: "Run checks with pre-commit"
+        run: "pre-commit run --all-files --show-diff-on-failure --color always"

.pre-commit-config.yaml

@@ -0,0 +1,13 @@
+repos:
+  - repo: "https://github.com/charliermarsh/ruff-pre-commit"
+    rev: "v0.0.269"
+    hooks:
+      - id: "ruff"
+        # NOTE: "--exit-non-zero-on-fix" is important for CI to function
+        # correctly!
+        args: ["--fix", "--exit-non-zero-on-fix"]
+
+  - repo: "https://github.com/psf/black"
+    rev: "23.3.0"
+    hooks:
+      - id: "black"

README.rst

@@ -24,7 +24,7 @@ Contact:
   Nathaniel J. Smith <[email protected]> and Stéfan van der Walt <[email protected]>
 
 Dependencies:
-  * Python 3.7+
+  * Python 3.8+
   * `colorspacious <https://pypi.python.org/pypi/colorspacious>`_
   * Matplotlib
   * NumPy

doc/contributing.md

@@ -21,3 +21,19 @@ rm -rf dist
 python -m build
 pip install dist/*.whl  # or `dist/*.tar.gz`
 ```
+
+
+## Code formatting and linting
+
+This codebase uses [black](https://black.readthedocs.io/en/stable/) and
+[ruff](https://github.com/charliermarsh/ruff) to automatically format and lint the code.
+
+[`pre-commit`](https://pre-commit.com/) is configured to run them automatically. You can
+trigger this manually with `pre-commit run --all-files`.
+
+Thanks to pre-commit, all commits should be formatted. In cases where formatting needs
+to be fixed (e.g. changing config of a linter), a format-only commit should be created,
+and then another commit should immediately follow which updates
+`.git-blame-ignore-revs`. For example:
+[1fec42d](https://github.com/matplotlib/viscm/pull/64/commits/1fec42d0baf90e00d510efd76cb6006fa0c70dc4),
+[8aa7bb0](https://github.com/matplotlib/viscm/pull/64/commits/8aa7bb01440aeca6f8bbcefe0671c28f2ce284c6).

environment.yml

@@ -3,10 +3,15 @@ channels:
   - "conda-forge"
   - "nodefaults"
 dependencies:
+  # Runtime
   - "python ~=3.11"
   - "numpy ~=1.24"
   - "matplotlib ~=3.7"
   - "colorspacious ~=1.1"
   - "scipy ~=1.10"
+
+  # Development
+  - "pre-commit"
+
   - pip:
     - "build ~=0.10"

pyproject.toml

@@ -15,7 +15,7 @@ classifiers = [
   "Programming Language :: Python :: 3",
 ]
 
-requires-python = "~=3.7"
+requires-python = "~=3.8"
 dependencies = [
   "numpy",
   "matplotlib",
@@ -45,4 +45,12 @@ packages = {find = {}}
 package-data = {viscm = ["examples/*"]}
 
 
-# [tool.black]
+[tool.black]
+target-version = ["py38", "py39", "py310", "py311"]
+
+[tool.ruff]
+target-version = "py38"
+select = ["F", "E", "W", "C90", "I", "UP", "YTT", "B", "A", "C4", "T10", "RUF"]
+
+[tool.ruff.mccabe]
+max-complexity = 11

tests.py

@@ -1,13 +1,13 @@
-from viscm.gui import *
-from viscm.bezierbuilder import *
 import numpy as np
-import matplotlib as mpl
-from matplotlib.backends.qt_compat import QtGui, QtCore
-from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
 
-cms = {"viscm/examples/sample_linear.jscm",
-         "viscm/examples/sample_diverging.jscm",
-         "viscm/examples/sample_diverging_continuous.jscm"}
+from viscm.bezierbuilder import json
+from viscm.gui import Colormap, viscm_editor
+
+cms = {
+    "viscm/examples/sample_linear.jscm",
+    "viscm/examples/sample_diverging.jscm",
+    "viscm/examples/sample_diverging_continuous.jscm",
+}
 
 
 def test_editor_loads_native():
@@ -16,8 +16,13 @@ def test_editor_loads_native():
             data = json.loads(f.read())
         cm = Colormap(None, "CatmulClark", "CAM02-UCS")
         cm.load(k)
-        viscm = viscm_editor(uniform_space=cm.uniform_space, cmtype=cm.cmtype, method=cm.method, **cm.params)
-        assert  viscm.name == data["name"]
+        viscm = viscm_editor(
+            uniform_space=cm.uniform_space,
+            cmtype=cm.cmtype,
+            method=cm.method,
+            **cm.params,
+        )
+        assert viscm.name == data["name"]
 
         extensions = data["extensions"]["https://matplotlib.org/viscm"]
         xp, yp, fixed = viscm.control_point_model.get_control_points()
@@ -26,7 +31,7 @@ def test_editor_loads_native():
         assert len(extensions["xp"]) == len(xp)
         assert len(extensions["yp"]) == len(yp)
         assert len(xp) == len(yp)
-        for i in range(len(xp)): 
+        for i in range(len(xp)):
             assert extensions["xp"][i] == xp[i]
             assert extensions["yp"][i] == yp[i]
         assert extensions["min_Jp"] == viscm.min_Jp
@@ -35,19 +40,34 @@ def test_editor_loads_native():
         assert extensions["cmtype"] == viscm.cmtype
 
         colors = data["colors"]
-        colors = [[int(c[i:i + 2], 16) / 256 for i in range(0, 6, 2)] for c in [colors[i:i + 6] for i in range(0, len(colors), 6)]]
+        colors = [
+            [int(c[i : i + 2], 16) / 256 for i in range(0, 6, 2)]
+            for c in [colors[i : i + 6] for i in range(0, len(colors), 6)]
+        ]
         editor_colors = viscm.cmap_model.get_sRGB(num=256)[0].tolist()
         for i in range(len(colors)):
             for z in range(3):
                 assert colors[i][z] == np.rint(editor_colors[i][z] / 256)
 
+
+# import matplotlib as mpl
+# from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
+# from matplotlib.backends.qt_compat import QtCore, QtGui
+#
 # def test_editor_add_point():
 #     # Testing linear
-
+#
 #     fig = plt.figure()
 #     figure_canvas = FigureCanvas(fig)
-#     linear = viscm_editor(min_Jp=40, max_Jp=60, xp=[-10, 10], yp=[0,0], figure=fig, cmtype="linear")
-
+#     linear = viscm_editor(
+#         min_Jp=40,
+#         max_Jp=60,
+#         xp=[-10, 10],
+#         yp=[0,0],
+#         figure=fig,
+#         cmtype="linear",
+#     )
+#
 #     Jp, ap, bp = linear.cmap_model.get_Jpapbp(3)
 #     eJp, eap, ebp = [40, 50, 60], [-10, 0, 10], [0, 0, 0]
 #     for i in range(3):
@@ -61,12 +81,24 @@ def test_editor_loads_native():
 #     for i in range(3):
 #         for z in range(3):
 #             assert approxeq(rgb[i][z], ergb[i][z])
-    
+
 
 #     # Testing adding a point to linear
 #     linear.bezier_builder.mode = "add"
-#     qtEvent = QtGui.QMouseEvent(QtCore.QEvent.MouseButtonPress, QtCore.QPoint(), QtCore.Qt.LeftButton, QtCore.Qt.LeftButton, QtCore.Qt.ShiftModifier)
-#     event = mpl.backend_bases.MouseEvent("button_press_event", figure_canvas, 0, 10, guiEvent=qtEvent)
+#     qtEvent = QtGui.QMouseEvent(
+#         QtCore.QEvent.MouseButtonPress,
+#         QtCore.QPoint(),
+#         QtCore.Qt.LeftButton,
+#         QtCore.Qt.LeftButton,
+#         QtCore.Qt.ShiftModifier,
+#     )
+#     event = mpl.backend_bases.MouseEvent(
+#         "button_press_event",
+#         figure_canvas,
+#         0,
+#         10,
+#         guiEvent=qtEvent,
+#     )
 #     event.xdata = 0
 #     event.ydata = 10
 #     event.inaxes = linear.bezier_builder.ax
@@ -87,8 +119,20 @@ def test_editor_loads_native():
 
 #     # Removing a point from linear
 #     linear.bezier_builder.mode = "remove"
-#     qtEvent = QtGui.QMouseEvent(QtCore.QEvent.MouseButtonPress, QtCore.QPoint(), QtCore.Qt.LeftButton, QtCore.Qt.LeftButton, QtCore.Qt.ControlModifier)
-#     event = mpl.backend_bases.MouseEvent("button_press_event", figure_canvas, 0, 10, guiEvent=qtEvent)
+#     qtEvent = QtGui.QMouseEvent(
+#         QtCore.QEvent.MouseButtonPress,
+#         QtCore.QPoint(),
+#         QtCore.Qt.LeftButton,
+#         QtCore.Qt.LeftButton,
+#         QtCore.Qt.ControlModifier,
+#     )
+#     event = mpl.backend_bases.MouseEvent(
+#         "button_press_event",
+#         figure_canvas,
+#         0,
+#         10,
+#         guiEvent=qtEvent,
+#     )
 #     event.xdata = 0
 #     event.ydata = 10
 #     event.inaxes = linear.bezier_builder.ax
@@ -102,7 +146,5 @@ def test_editor_loads_native():
 #     # print(linear.cmap_model.get_Jpapbp(3))
 
 
-
 def approxeq(x, y, err=0.0001):
     return abs(y - x) < err
-

viscm/__main__.py

@@ -4,4 +4,5 @@
 # See file LICENSE.txt for license information.
 
 from .cli import cli
+
 cli()