在matplotlib方程标签中使用特殊字符\ddagger而不使用latex

import matplotlib.pyplot as plt

fig, ax = plt.subplots()

equation_label = r'$x^2 + y^2 = \ddagger$'

ax.plot(x, y)
ax.set_xlabel('x')
ax.set_ylabel('y')
ax.set_title('Equation')
ax.text(x_position, y_position, equation_label, fontsize=12)

plt.show()