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BUG: Fixes #36918 boxplots with matplotlib #37107

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13 changes: 6 additions & 7 deletions pandas/plotting/_matplotlib/boxplot.py
Original file line number Diff line number Diff line change
Expand Up @@ -246,6 +246,7 @@ def boxplot(
):

import matplotlib.pyplot as plt
from matplotlib.ticker import FixedFormatter

# validate return_type:
if return_type not in BoxPlot._valid_return_types:
Expand Down Expand Up @@ -302,15 +303,13 @@ def plot_group(keys, values, ax: "Axes"):
bp = ax.boxplot(values, **kwds)
if fontsize is not None:
ax.tick_params(axis="both", labelsize=fontsize)

if kwds.get("vert", 1):
ticks = ax.get_xticks()
if len(ticks) != len(keys):
i, remainder = divmod(len(ticks), len(keys))
assert remainder == 0, remainder
keys *= i
ax.set_xticklabels(keys, rotation=rot)
axis = ax.xaxis
else:
ax.set_yticklabels(keys, rotation=rot)
axis = ax.yaxis
axis.set_major_formatter(FixedFormatter(keys))
ax.tick_params(axis=axis.axis_name, which="major", rotation=rot)
Comment on lines +313 to +314
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nice clean-up!

maybe_color_bp(bp, **kwds)

# Return axes in multiplot case, maybe revisit later # 985
Expand Down