How to edit a seaborn legend title and labels for figure-level functions

Took me a while to read through the above. This was the answer for me:

import seaborn as snsimport matplotlib.pyplot as plttips = sns.load_dataset("tips")g = sns.lmplot(    x="total_bill",     y="tip",     hue="smoker",     data=tips,      legend=False)plt.legend(title='Smoker', loc='upper left', labels=['Hell Yeh', 'Nah Bruh'])plt.show(g)

Reference this for more arguments: matplotlib.pyplot.legend

• If legend_out is set to True then legend is available through the g._legend property and it is a part of a figure. Seaborn legend is standard matplotlib legend object. Therefore you may change legend texts.
• Tested in python 3.8.11, matplotlib 3.4.3, seaborn 0.11.2

import seaborn as sns# load the tips datasettips = sns.load_dataset("tips")# plotg = sns.lmplot(x="total_bill", y="tip", hue="smoker", data=tips, markers=["o", "x"], facet_kws={'legend_out': True})# titlenew_title = 'My title'g._legend.set_title(new_title)# replace labelsnew_labels = ['label 1', 'label 2']for t, l in zip(g._legend.texts, new_labels):    t.set_text(l)

Another situation if legend_out is set to False. You have to define which axes has a legend (in below example this is axis number 0):

g = sns.lmplot(x="total_bill", y="tip", hue="smoker", data=tips, markers=["o", "x"], facet_kws={'legend_out': False})# check axes and find which is have legendleg = g.axes.flat[0].get_legend()new_title = 'My title'leg.set_title(new_title)new_labels = ['label 1', 'label 2']for t, l in zip(leg.texts, new_labels):    t.set_text(l)

Moreover you may combine both situations and use this code:

g = sns.lmplot(x="total_bill", y="tip", hue="smoker", data=tips, markers=["o", "x"], facet_kws={'legend_out': True})# check axes and find which is have legendfor ax in g.axes.flat:    leg = g.axes.flat[0].get_legend()    if not leg is None: break# or legend may be on a figureif leg is None: leg = g._legend# change legend textsnew_title = 'My title'leg.set_title(new_title)new_labels = ['label 1', 'label 2']for t, l in zip(leg.texts, new_labels):    t.set_text(l)

This code works for any seaborn plot which is based on Grid class.