弄好了 但不知是不是最优方法

import re
import numpy as np  
import matplotlib.pyplot as plt  

a=[]
b=[]
for line in open("t.txt"):  
    q=re.split('\D',line)
    x=int(q[1])
    y=int(q[2])
    a.append(x)
    b.append(y)
print a,b
plt.plot(a,b,'or')
plt.show()

自己的小程序的话，可以用eval

from PIL import Image


def draw():
    # read file
    pixels_array = []
    with open('pixels.txt', 'r') as fp_iter:
        for line in fp_iter:
            pixels_array.append(eval(line))

    # draw
    color = (128, 128, 128)
    im = Image.new('RGB', (256, 256), (255, 255, 255))
    for position in pixels_array:
        im.putpixel(position, color)
    im.show()