p = 2
m = 1
F = GF(p^(2), 'a')
a = F.gens()[0]
Rx.<x> = PolynomialRing(F)
f = x
C_super = superelliptic(f, m)

Rxy.<x, y> = PolynomialRing(F, 2)
f1 = superelliptic_function(C_super, x^3)
f2 = superelliptic_function(C_super, a*x^3)
AS = as_cover(C_super, [f1, f2], prec=1000)
#print(AS.at_most_poles(7))