use the icon of the tkinter settings window to report an error

-sharptkintericonbitmap
from tkinter import *

def main():
    root = Tk()
    root.title("Change Logo")
    root.geometry("350x150")
    root.iconbitmap("python.ico")
    root.mainloop()



if __name__ == "__main__":
    main()

error message:

_tkinter.TclError: bitmap "python.ico" not defined

searched for this question for a long time, some people on stackoverflow also asked, but also did not find the answer, some people said that in the Windows there will be this question
but I used the Linux,python3.5, absolute path, the same error, some people said that this function only supports black and white ico image, but I use the ico picture is black and white.
ask for the Great God.