My code contains the following lines:
from matplotlib.figure import Figure
figure = Figure(figsize=(10, 5), dpi=dpi)
How can I add text to this
Texts can be added from a axis object. So you may try this:
from matplotlib.figure import Figure
figure = Figure(figsize=(10, 5), dpi=dpi)
ax = figure.add_axes((0.05, 0.05, 0.9, 0.9))
ax.text(0.5, 0.5, 'Text', ha='center')
More examples can see the document, and details of parameters here