DOC: don't index or unpack the return value of pie (matplotlib#30799)

Author: rcomer

galleries/examples/misc/demo_agg_filter.py

@@ -269,19 +269,19 @@ def drop_shadow_patches(ax):
 def light_filter_pie(ax):
     fracs = [15, 30, 45, 10]
     explode = (0.1, 0.2, 0.1, 0.1)
-    pies = ax.pie(fracs, explode=explode)
+    pie = ax.pie(fracs, explode=explode)
 
     light_filter = LightFilter(9)
-    for p in pies[0]:
+    for p in pie.wedges:
         p.set_agg_filter(light_filter)
         p.set_rasterized(True)  # to support mixed-mode renderers
         p.set(ec="none",
               lw=2)
 
     gauss = DropShadowFilter(9, offsets=(3, -4), alpha=0.7)
-    shadow = FilteredArtistList(pies[0], gauss)
+    shadow = FilteredArtistList(pie.wedges, gauss)
     ax.add_artist(shadow)
-    shadow.set_zorder(pies[0][0].get_zorder() - 0.1)
+    shadow.set_zorder(pie.wedges[0].get_zorder() - 0.1)
 
 
 if __name__ == "__main__":

galleries/examples/pie_and_polar_charts/bar_of_pie.py

@@ -25,8 +25,8 @@
 explode = [0.1, 0, 0]
 # rotate so that first wedge is split by the x-axis
 angle = -180 * overall_ratios[0]
-wedges, *_ = ax1.pie(overall_ratios, autopct='%1.1f%%', startangle=angle,
-                     labels=labels, explode=explode)
+pie = ax1.pie(overall_ratios, autopct='%1.1f%%', startangle=angle,
+              labels=labels, explode=explode)
 
 # bar chart parameters
 age_ratios = [.33, .54, .07, .06]
@@ -47,8 +47,8 @@
 ax2.set_xlim(- 2.5 * width, 2.5 * width)
 
 # use ConnectionPatch to draw lines between the two plots
-theta1, theta2 = wedges[0].theta1, wedges[0].theta2
-center, r = wedges[0].center, wedges[0].r
+theta1, theta2 = pie.wedges[0].theta1, pie.wedges[0].theta2
+center, r = pie.wedges[0].center, pie.wedges[0].r
 bar_height = sum(age_ratios)
 
 # draw top connecting line