[Python] sns.histplot does not fully show the legend when setting the legend outside the axes

I tried to create a histogram with a legend outside the axes. Here is my code:

import pandas as pd
import seaborn as sns

df_long = pd.DataFrame({
"Category": ["A", "B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D"],
"Round": ["Round1", "Round1", "Round1", "Round1", "Round2", "Round2", "Round2", "Round2", "Round3", "Round3", "Round3", "Round3", "Round4", "Round4", "Round4", "Round4"],
"Value": [10, 20, 10, 30, 20, 25, 15, 25, 12, 15, 19, 6, 10, 29, 13, 19]
})
ax = sns.histplot(df_long, x="Category", hue="Round", weights="Value",
multiple="stack",
shrink=.8,
)
ax.set_ylabel('Weight')
legend = ax.get_legend()
legend.set_bbox_to_anchor((1, 1))


It works fine in jupyter notebook:



But, if I try to create a png or pdf using matplotlib, the legend is not displayed completely.

import matplotlib.pyplot as plt

plt.savefig("histogram.png")
plt.savefig("histogram.pdf")




I've already tried to adjust the size of the graph by using plt.figure(figsize=(4, 4)) and the problem still exist.

Continue reading...