It is in fact spelt "Legendre", not "Legendere"

lucas.py

             yield -val
         val = val + 2
 
-def Legendere(a, p):
+def Legendre(a, p):
     if (p % 2 == 0):
         raise ValueError("p must be odd, is {}".format(p))
     lv =  pow(a, (p-1)//2, p)