• Python: 3.8.11
  • OS: Ubuntu Kylin 20.04
  • Conda: 4.10.1
  • PyCharm: 2021.1.3 (Community Edition)

code

@author: Date: 8/6/21 ""

from tkinter import *


def main() :
    root = Tk()
    w = Canvas(root, width=200, height=200, background='white')
    w.pack()

    def _paint(event) :
        X the horizontal coordinate of the left mouse button
        Y Specifies the left mouse button
        x1, y1 = (event.x - 1), (event.y - 1)
        x2, y2 = (event.x + 1), (event.y + 1)
        w.create_oval(x1, y1, x2, y2, fill='black')

    # Left mouse click, draw a small ellipse

    Bind the canvas with the left mouse button
    w.bind("<B1-Motion>", _paint)

    mainloop()


if __name__ == '__main__':
    main()

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The results

The resources

  • Tkinter document

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Python is open source, cross-platform, interpretive, and interactive, and worth learning. Python’s design philosophy: elegant, unambiguous, simple. Advocate one way, preferably only one way to do one thing. Guis can be created with PyQt5, PySide2, wxPython, PyGObject, wxWidgets, etc. Code should be written in accordance with specifications to facilitate communication and understanding. Every language has its own unique ideas. Beginners need to change their thinking, practice and accumulate.