Clean up E402 in examples.

Author: QuLogic

.flake8

@@ -112,7 +112,6 @@ per-file-ignores =
     tutorials/toolkits/axisartist.py: E501
 
     examples/animation/frame_grabbing_sgskip.py: E402
-    examples/axes_grid1/inset_locator_demo.py: E402
     examples/axes_grid1/scatter_hist_locatable_axes.py: E402
     examples/axisartist/demo_curvelinear_grid.py: E402
     examples/color/color_by_yvalue.py: E402
@@ -170,18 +169,14 @@ per-file-ignores =
     examples/lines_bars_and_markers/joinstyle.py: E402
     examples/lines_bars_and_markers/scatter_hist.py: E402
     examples/lines_bars_and_markers/scatter_piecharts.py: E402
-    examples/lines_bars_and_markers/scatter_with_legend.py: E402
     examples/lines_bars_and_markers/span_regions.py: E402
     examples/lines_bars_and_markers/stem_plot.py: E402
     examples/lines_bars_and_markers/step_demo.py: E402
     examples/lines_bars_and_markers/timeline.py: E402
     examples/lines_bars_and_markers/xcorr_acorr_demo.py: E402
-    examples/misc/agg_buffer.py: E402
     examples/misc/histogram_path.py: E402
     examples/misc/print_stdout_sgskip.py: E402
     examples/misc/rasterization_demo.py: E402
-    examples/misc/svg_filter_line.py: E402
-    examples/misc/svg_filter_pie.py: E402
     examples/misc/table_demo.py: E201
     examples/mplot3d/surface3d.py: E402
     examples/pie_and_polar_charts/bar_of_pie.py: E402
@@ -221,7 +216,6 @@ per-file-ignores =
     examples/shapes_and_collections/dolphin.py: E402
     examples/shapes_and_collections/donut.py: E402
     examples/shapes_and_collections/ellipse_collection.py: E402
-    examples/shapes_and_collections/ellipse_demo.py: E402
     examples/shapes_and_collections/fancybox_demo.py: E402
     examples/shapes_and_collections/hatch_demo.py: E402
     examples/shapes_and_collections/hatch_style_reference.py: E402
@@ -242,7 +236,6 @@ per-file-ignores =
     examples/style_sheets/bmh.py: E501
     examples/style_sheets/plot_solarizedlight2.py: E501
     examples/subplots_axes_and_figures/axes_margins.py: E402
-    examples/subplots_axes_and_figures/axes_zoom_effect.py: E402
     examples/subplots_axes_and_figures/custom_figure_class.py: E402
     examples/subplots_axes_and_figures/demo_constrained_layout.py: E402
     examples/subplots_axes_and_figures/demo_tight_layout.py: E402
@@ -254,19 +247,16 @@ per-file-ignores =
     examples/text_labels_and_annotations/demo_text_rotation_mode.py: E402
     examples/text_labels_and_annotations/custom_legends.py: E402
     examples/text_labels_and_annotations/fancyarrow_demo.py: E402
-    examples/text_labels_and_annotations/font_family_rc_sgskip.py: E402
     examples/text_labels_and_annotations/font_file.py: E402
     examples/text_labels_and_annotations/legend.py: E402
     examples/text_labels_and_annotations/line_with_text.py: E402
     examples/text_labels_and_annotations/mathtext_asarray.py: E402
-    examples/text_labels_and_annotations/tex_demo.py: E402
     examples/text_labels_and_annotations/watermark_text.py: E402
     examples/ticks_and_spines/custom_ticker1.py: E402
     examples/ticks_and_spines/date_concise_formatter.py: E402
     examples/ticks_and_spines/major_minor_demo.py: E402
     examples/ticks_and_spines/tick-formatters.py: E402
     examples/ticks_and_spines/tick_labels_from_values.py: E402
-    examples/user_interfaces/canvasagg.py: E402
     examples/user_interfaces/embedding_in_gtk3_panzoom_sgskip.py: E402
     examples/user_interfaces/embedding_in_gtk3_sgskip.py: E402
     examples/user_interfaces/embedding_in_qt_sgskip.py: E402

examples/axes_grid1/inset_locator_demo.py

@@ -135,7 +135,7 @@
 
 # Create an inset horizontally centered in figure coordinates and vertically
 # bound to line up with the axes.
-from matplotlib.transforms import blended_transform_factory
+from matplotlib.transforms import blended_transform_factory  # noqa
 transform = blended_transform_factory(fig.transFigure, ax2.transAxes)
 axins4 = inset_axes(ax2, width="16%", height="34%",
                     bbox_to_anchor=(0, 0, 1, 1),

examples/lines_bars_and_markers/scatter_with_legend.py

@@ -12,9 +12,10 @@
 """
 
 import numpy as np
-np.random.seed(19680801)
 import matplotlib.pyplot as plt
 
+np.random.seed(19680801)
+
 
 fig, ax = plt.subplots()
 for color in ['tab:blue', 'tab:orange', 'tab:green']:

examples/misc/agg_buffer.py

@@ -8,6 +8,7 @@
 """
 
 import numpy as np
+from PIL import Image
 
 from matplotlib.backends.backend_agg import FigureCanvasAgg
 import matplotlib.pyplot as plt
@@ -21,7 +22,6 @@
 X = np.asarray(agg.buffer_rgba())
 
 # Pass off to PIL.
-from PIL import Image
 im = Image.fromarray(X)
 
 # Uncomment this line to display the image using ImageMagick's `display` tool.

examples/misc/svg_filter_line.py

@@ -9,6 +9,8 @@
 support it.
 """
 
+import io
+import xml.etree.ElementTree as ET
 
 import matplotlib.pyplot as plt
 import matplotlib.transforms as mtransforms
@@ -52,13 +54,10 @@
 ax.set_ylim(0., 1.)
 
 # save the figure as a bytes string in the svg format.
-from io import BytesIO
-f = BytesIO()
+f = io.BytesIO()
 plt.savefig(f, format="svg")
 
 
-import xml.etree.ElementTree as ET
-
 # filter definition for a gaussian blur
 filter_def = """
   <defs xmlns='http://www.w3.org/2000/svg'
@@ -83,5 +82,5 @@
     shadow.set("filter", 'url(#dropshadow)')
 
 fn = "svg_filter_line.svg"
-print("Saving '%s'" % fn)
+print(f"Saving '{fn}'")
 ET.ElementTree(tree).write(fn)

examples/misc/svg_filter_pie.py

@@ -10,6 +10,9 @@
 support it.
 """
 
+import io
+import xml.etree.ElementTree as ET
+
 import matplotlib.pyplot as plt
 from matplotlib.patches import Shadow
 
@@ -42,12 +45,9 @@
 
 
 # save
-from io import BytesIO
-f = BytesIO()
+f = io.BytesIO()
 plt.savefig(f, format="svg")
 
-import xml.etree.ElementTree as ET
-
 
 # filter definition for shadow using a gaussian blur
 # and lightening effect.
@@ -94,5 +94,5 @@
     shadow.set("filter", 'url(#dropshadow)')
 
 fn = "svg_filter_pie.svg"
-print("Saving '%s'" % fn)
+print(f"Saving '{fn}'")
 ET.ElementTree(tree).write(fn)

examples/shapes_and_collections/ellipse_demo.py

@@ -42,10 +42,6 @@
 # Draw many ellipses with different angles.
 #
 
-import matplotlib.pyplot as plt
-import numpy as np
-from matplotlib.patches import Ellipse
-
 angle_step = 45  # degrees
 angles = np.arange(0, 180, angle_step)
 

examples/subplots_axes_and_figures/axes_zoom_effect.py

@@ -5,6 +5,8 @@
 
 """
 
+import matplotlib.pyplot as plt
+
 from matplotlib.transforms import (
     Bbox, TransformedBbox, blended_transform_factory)
 from mpl_toolkits.axes_grid1.inset_locator import (
@@ -107,8 +109,6 @@ def zoom_effect02(ax1, ax2, **kwargs):
     return c1, c2, bbox_patch1, bbox_patch2, p
 
 
-import matplotlib.pyplot as plt
-
 plt.figure(figsize=(5, 5))
 ax1 = plt.subplot(221)
 ax2 = plt.subplot(212)

examples/text_labels_and_annotations/font_family_rc_sgskip.py

@@ -19,11 +19,11 @@
                                  'Lucida Grande', 'Verdana']
 """
 
-from matplotlib import rcParams
-rcParams['font.family'] = 'sans-serif'
-rcParams['font.sans-serif'] = ['Tahoma']
 import matplotlib.pyplot as plt
 
+plt.rcParams['font.family'] = 'sans-serif'
+plt.rcParams['font.sans-serif'] = ['Tahoma']
+
 fig, ax = plt.subplots()
 ax.plot([1, 2, 3], label='test')
 

examples/text_labels_and_annotations/tex_demo.py

@@ -14,10 +14,10 @@
 """
 
 import numpy as np
-import matplotlib
-matplotlib.rcParams['text.usetex'] = True
 import matplotlib.pyplot as plt
 
+plt.rcParams['text.usetex'] = True
+
 
 t = np.linspace(0.0, 1.0, 100)
 s = np.cos(4 * np.pi * t) + 2