>>> """ ================= Annotate Simple01 ================= """
... import matplotlib.pyplot as plt
...
...
... fig, ax = plt.subplots(figsize=(3, 3))
...
... ax.annotate("",
... xy=(0.2, 0.2), xycoords='data',
... xytext=(0.8, 0.8), textcoords='data',
... arrowprops=dict(arrowstyle="->",
... connectionstyle="arc3"),
... )
...
... plt.show()
...