使用Python画出一个心形

import numpy as np
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['Microsoft YaHei']
x = np.arange(-30,30,0.05)
y = np.arange(-30,30,0.05)
X = []
Y = []
for i in x:
    for j in y:
        if (i**2+j**2 -1)**3-i**2*j**3 <=0:
            X.append(i)
            Y.append(j)
plt.figure(figsize=(10,10))
plt.scatter(X,Y,c=range(len(X)),cmap='rainbow',marker='*')
plt.title('使用Python画出一个心形')
plt.show()