怎样用Python读入.txt里四个坐标点并绘制矩形？

现有.txt文件，包含若干个矩形，每一行为左上，右上，左下，右下坐标点，格式如：（10 10）（20 10）（10 20）（20 20），如何读入四个坐标显示，并绘制矩形框，请各位大神帮助，感激不尽！

import matplotlib.pyplot as plt
import re

def line2points(line):
xs=[]
ys=[]
line=line.strip()
line=re.sub(r' +',',',line)
points=eval(line)
points=list(points)
points.sort(key=lambda i:sum(i))
points[-2:]=points[-1:-3:-1]
points.append(points[0])
for x,y in points:
xs.append(x)
ys.append(y)
return xs,ys

with open('datafilename.txt','r') as f:
line=f.readline()
x,y=line2points(line)
plt.plot(x,y)
line=lf.readline()
plt.show()

先用pip install 安装 tkinter

import tkinter;

if __name__ == '__main__':
    from tkinter import

    root = Tk()
    root.title('Canvas')
    canvas = Canvas(root, width=400, height=400, bg='yellow')
    x0 = 200
    y0 = 200
    y1 = 200
    x1 = 200
    for i in range(5):
        canvas.create_rectangle(x0, y0, x1, y1)
        canvas.create_oval(x0, y0, x1, y1)
        x0 -= 10
        y0 -= 10
        x1 += 10
        y1 += 10

    canvas.pack()
    root.mainloop()

这里是左上角右下角，换成你文本文件的即可