Remove italics in latex subscript symbol in matplotlib

Question

I am trying to remove italics font from a latex symbol in a matplotlib plot. I tried \mathrm{/copyright} from the following post, but it seems to not work with symbols: remove italics in latex subscript in matplotlib

Please help!

import numpy as np
import matplotlib.pyplot as plt

x = np.arange(10)
y = x

plt.plot(x,y,'ro')
plt.xlabel("$\mathrm{\copyright}$")