Python drawing concentric circles with a little practice tkinter

Small practice of code in Python, using tkinter "with a circle painted round school": the [development environment: Win10, python3.7]

 

import tkinter

if __name__ == '__main__':

    t = tkinter.Tk()

    canvas = tkinter.Canvas(width=800, height=600, bg='yellow')  

    canvas.pack(expand=tkinter.YES, fill=tkinter.BOTH)                

    k = 1

    j = 1

    for i in range(0,26):

        canvas.create_oval(310 - k,250 - k,310 + k,250 + k, width=1)

        k += j

        j += 0.3

    t.mainloop ()

 

 

Mark a link tkinter package, as if speaking more detailed, left to look after.

https://www.cnblogs.com/shwee/p/9427975.html