Python documentation on creation of an exponential random variable

I didn’t really know if this stack was the right place to post but I was reading the documentation for creating an exponential random variable in numpy. But isn’t there a typo. Like shouldn’t it be :

$f(x; beta) = frac{1}{beta} exp(-frac{x}{beta})$ instead of $f(x; frac{1}{beta}) = frac{1}{beta} exp(-frac{x}{beta})$?