List of far points of two list

[antoniomancera]

I'm trying to create a program that for two list xs and ys, return a list zs with only the element of ys that their distance of any element of xs be at least d.

def distance(a,b):
    y=sqrt((a.real-b.real)**2+(a.imag-b.imag)**2)
    return y


    

def dist(xs,ys,d):
    zs=[]
    for i in range(0,len(xs)-1):
        for k in range(0,len(ys)-1):
            if distancia(xs[i],ys[k])<=d:
                zs=zs 
                break
            else:
                zs=zs+[ys[i]]
    return zs

But it's wrong, and I don't know how to fixed it. Could you help me please?.

Thank you.