Matplotlib affecting tkinter window size and process behavior

Question

From a more complex example, i distilled this minimal example:

from tkinter import Frame, Tk

class Example(Frame):

    def __init__(self, master):
        super().__init__(master)
        plt.figure() # this makes the window smaller


def main():
    root = Tk()
    root.geometry("500x500")
    app = Example(root)
    root.mainloop()


if __name__ == '__main__':
    main()

The plt.figure() makes the window smaller and the process not end when I click the X on the top right. I really don't understand how a matplotlib command could cause this behaviour. A plt.close() allows me to kill the process by closing the window, but doesn't solve the size problem, and starts up the window behind other open windows.

Answer 1

Solved it by using plt.Figure() instead. Also plt.savefig() poses this problem, so if anyone reading this has this same issue, you can try:

fig = plt.Figure()
# work on figure...
fig.savefig("file.png")