python3.x 畫圖二維

import numpy as np
import matplotlib
import matplotlib.pyplot as plt
from pandas import *
import csv
with open ("E:/6Machine Learning/Deep learning/ML2017/hw1.1/hw1/data/train.csv", "r") as csvfile:
    read = csv.DictReader(csvfile)
    price = [row["price"] for row in read]
    a = len(price)
with open("E:/6Machine Learning/Deep learning/ML2017/hw1.1/hw1/data/train.csv", "r") as csvfile:
    read = csv.DictReader(csvfile)
    sqft_living=[row["sqft_living"] for row in read]
    b=len(sqft_living)
# plt.figure(1)
# plt.plot(price, sqftliving)
# plt.show()
print(b)
print(a)
print(price)
print(sqft_living)
f1=plt.figure(1)
plt.subplot(211)
plt.scatter(price,sqft_living)
plt.subplot(212)
plt.scatter(sqft_living,price)
plt.show()