Create a triangle and show label of vertices

triangle.py

# Create a triangle + label of vertices


import numpy as np
import matplotlib.pyplot as plt
%matplotlib inline

fig, ax = plt.subplots(1,1,figsize=(5,5))
ax.plot(*coordinates[bonds].T, '-o', lw=3);
for i, p in enumerate(coordinates):
    ax.text(*(p+[-0.03,0.06]), i, fontsize=15)
ax.axis("equal")
ax.set_axis_off()
plt.show(fig)