Matplotlib legend: Remove error bars, show only marker symbols

mpl_legend_markers_only.py

import matplotlib as mpl
import matplotlib.pyplot as plt

# some pseudo-data (incomplete)
df1 = ...
df2 = ...

fig, ax = plt.subplots()
ax.errorbar(df1.x, df1.y, yerr=df1.yerr, label='df1')
ax.errorbar(df2.x, df2.y, yerr=df2.yerr, label='df2')

handles, labels = ax.get_legend_handles_labels()
handles = [h[0] if isinstance(h, mpl.container.ErrorbarContainer) else h for h in handles]
ax.legend(handles, labels)
plt.show()