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src/napari_matplotlib/feature_histogram.py

@@ -1,8 +1,7 @@
 import numpy as np
+from qtpy.QtWidgets import QCheckBox, QComboBox, QLabel
 
 from .base import NapariMPLWidget
-from qtpy.QtWidgets import QComboBox, QLabel, QCheckBox
-from qtpy.QtCore import QSize
 
 __all__ = ["FeatureHistogramWidget"]
 
@@ -17,9 +16,16 @@ class FeatureHistogramWidget(NapariMPLWidget):
     """
 
     n_layers_input = Interval(1, 1)
-    input_layer_types = (napari.layers.Image, napari.layers.Labels, napari.layers.Points, napari.layers.Surface)
-
-    def __init__(self, napari_viewer: napari.viewer.Viewer, column_name: str = None):
+    input_layer_types = (
+        napari.layers.Image,
+        napari.layers.Labels,
+        napari.layers.Points,
+        napari.layers.Surface,
+    )
+
+    def __init__(
+        self, napari_viewer: napari.viewer.Viewer, column_name: str = None
+    ):
         super().__init__(napari_viewer)
         self.axes = self.canvas.figure.subplots()
 
@@ -35,7 +41,9 @@ def __init__(self, napari_viewer: napari.viewer.Viewer, column_name: str = None)
         self.layout().addWidget(self.logarithmic_plot)
 
         # listen to laer changed
-        napari_viewer.layers.selection.events.changed.connect(self.update_available_columns)
+        napari_viewer.layers.selection.events.changed.connect(
+            self.update_available_columns
+        )
 
         # setup GUI
         self.update_layers(None)
@@ -74,8 +82,10 @@ def draw(self) -> None:
             data = layer.features[selected_column]
             bins = np.linspace(np.min(data), np.max(data), 100)
             self.clear()
-            self.axes.hist(data,
-                           bins=bins,
-                           label=layer.name + " / " + selected_column,
-                           log=self.logarithmic_plot.isChecked())
+            self.axes.hist(
+                data,
+                bins=bins,
+                label=layer.name + " / " + selected_column,
+                log=self.logarithmic_plot.isChecked(),
+            )
             self.axes.legend()

src/napari_matplotlib/tests/test_feature_histogram.py

@@ -1,22 +1,23 @@
-from napari_matplotlib import FeatureHistogramWidget
 import numpy as np
 
+from napari_matplotlib import FeatureHistogramWidget
+
+
 def test_example_q_widget(make_napari_viewer):
     # Smoke test adding a histogram widget
     viewer = make_napari_viewer()
 
     image = np.asarray([[0, 1], [2, 1]])
     labels = image.astype(int)
 
-
     viewer.add_image(image)
 
     labels_layer = viewer.add_labels(labels)
 
     labels_layer.features = {
-        'labels': [1, 2],
-        'area': [2, 1],
-        'aspect_ratio': [2, 1]
+        "labels": [1, 2],
+        "area": [2, 1],
+        "aspect_ratio": [2, 1],
     }
 
     FeatureHistogramWidget(viewer)