matplotlib
diff --git a/‎lib/matplotlib/axis.py
Copy file name to clipboardExpand all lines: lib/matplotlib/axis.py
+3-1Lines changed: 3 additions & 1 deletion b/‎lib/matplotlib/axis.py
Copy file name to clipboardExpand all lines: lib/matplotlib/axis.py
+3-1Lines changed: 3 additions & 1 deletion
diff --git a/‎lib/matplotlib/figure.py
Copy file name to clipboardExpand all lines: lib/matplotlib/figure.py
+4-3Lines changed: 4 additions & 3 deletions b/‎lib/matplotlib/figure.py
Copy file name to clipboardExpand all lines: lib/matplotlib/figure.py
+4-3Lines changed: 4 additions & 3 deletions
@@ -1866,9 +1866,10 @@ def _get_tick_boxes_siblings(self, renderer):
         """
         bboxes = []
         bboxes2 = []
+        # get the Grouper that keeps track of x-label groups for this figure
         grp = self.figure._align_xlabel_grp
         # if we want to align labels from other axes:
-        for axx in grp.get_siblings(self.axes):
+        for nn, axx in enumerate(grp.get_siblings(self.axes)):
             ticks_to_draw = axx.xaxis._update_ticks(renderer)
             tlb, tlb2 = axx.xaxis._get_tick_bboxes(ticks_to_draw, renderer)
             bboxes.extend(tlb)
@@ -2234,6 +2235,7 @@ def _get_tick_boxes_siblings(self, renderer):
         """
         bboxes = []
         bboxes2 = []
+        # get the Grouper that keeps track of y-label groups for this figure
         grp = self.figure._align_ylabel_grp
         # if we want to align labels from other axes:
         for axx in grp.get_siblings(self.axes):
 
@@ -381,6 +381,8 @@ def __init__(self,
         self._cachedRenderer = None
 
         # groupers to keep track of x and y labels we want to align.
+        # see self.align_xlabels and self.align_ylabels and
+        # axis._get_tick_boxes_siblings
         self._align_xlabel_grp = cbook.Grouper()
         self._align_ylabel_grp = cbook.Grouper()
 
@@ -2133,8 +2135,7 @@ def align_xlabels(self, axs=None):
 
         if axs is None:
             axs = self.axes
-        axs = np.asarray(np.array(axs)).flatten().tolist()
-
+        axs = np.asarray(axs).flatten()
         for ax in axs:
             _log.debug(' Working on: %s', ax.get_xlabel())
             ss = ax.get_subplotspec()
@@ -2201,7 +2202,7 @@ def align_ylabels(self, axs=None):
 
         if axs is None:
             axs = self.axes
-        axs = np.asarray(np.array(axs)).flatten().tolist()
+        axs = np.asarray(axs).flatten()
         for ax in axs:
             _log.debug(' Working on: %s', ax.get_ylabel())
             ss = ax.get_subplotspec()