ruff: Ignore the B018 rule (useless expressions) in examples (#3750)

Author: seisman

examples/gallery/images/rgb_image.py

@@ -28,7 +28,7 @@
     # Subset to area of Lāhainā in EPSG:32604 coordinates
     image = img.rio.clip_box(minx=738000, maxx=755000, miny=2300000, maxy=2318000)
     image = image.load()  # Force loading the DataArray into memory
-image  # noqa: B018
+image
 
 # %%
 # Plot the RGB imagery:

examples/gallery/lines/linestrings.py

@@ -25,7 +25,7 @@
 
 # Convert object to EPSG 4326 coordinate system
 gdf = gdf.to_crs("EPSG:4326")
-print(gdf.head())
+gdf.head()
 
 # %%
 fig = pygmt.Figure()

examples/gallery/maps/choropleth_map.py

@@ -20,7 +20,7 @@
 
 # Read the example dataset provided by geodatasets.
 gdf = gpd.read_file(geodatasets.get_path("geoda airbnb"))
-print(gdf)
+print(gdf.head())
 
 # %%
 fig = pygmt.Figure()

examples/tutorials/basics/plot.py

@@ -18,17 +18,17 @@
 # The data are loaded as a :class:`pandas.DataFrame`.
 
 data = pygmt.datasets.load_sample_data(name="japan_quakes")
+data.head()
 
+# %%
 # Set the region for the plot to be slightly larger than the data bounds.
 region = [
     data.longitude.min() - 1,
     data.longitude.max() + 1,
     data.latitude.min() - 1,
     data.latitude.max() + 1,
 ]
-
-print(region)
-print(data.head())
+region
 
 # %%
 # We'll use the :meth:`pygmt.Figure.plot` method to plot circles on the

pyproject.toml

@@ -160,7 +160,10 @@ known-third-party = ["pygmt"]
 [tool.ruff.lint.per-file-ignores]
 "__init__.py" = ["F401"]  # Ignore `F401` (unused-import) in all `__init__.py` files
 "*/tests/test_*.py" = ["S101"]  # Ignore `S101` (use of assert) in all tests files
-"examples/**/*.py" = ["T201"]  # Allow `print` in examples
+"examples/**/*.py" = [ # Ignore rules in examples
+    "B018",  # Allow useless expressions in Jupyter Notebooks
+    "T201",  # Allow `print` statements
+]
 
 [tool.ruff.lint.pycodestyle]
 max-doc-length = 88