import numpy as np
import matplotlib as mpl
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import matplotlib.font_manager as fm

plt.rcParams['axes.unicode_minus'] = False

# 绘制三维图形
ax = plt.subplot(111, projection='3d')

# 生成测试数据
theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)
z = np.linspace(-4, 4, 100) * 0.3
r = z**4 + 1
x = r * np.sin(theta)
y = r * np.cos(theta)

# 绘制三维曲线，设置标签
ax.plot(x, y, z, 'rv-', label='参数曲线')

# 设置图例字体、字号，显示图例
mpl.rcParams['legend.fontsize'] = 10
ax.legend(prop='simhei')

plt.show()