The `draw` function is a method in the `FigureCanvasTkAgg` class of the `matplotlib.backends` module in Python. This function is used to draw the contents of the figure onto the canvas.
When called, the `draw` function updates the display by rendering all the elements, such as plots, lines, and text, that are part of the figure onto the Tkinter canvas. This allows the changes made to the figure, such as updating data or modifying the layout, to be immediately reflected on the canvas. The `draw` function ensures that the visual representation of the figure on the canvas is synchronized with its underlying data.
In summary, the `draw` function in `FigureCanvasTkAgg` is responsible for rendering the contents of a figure onto a Tkinter canvas, ensuring that any recent modifications to the figure are accurately displayed.
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