Lab 5 - Find index of (the last) minimum value in array

def lastmin_array():
   A = [23,22,89,24,45,26,72,81,89,55,900,889,225,21,900,21]
   i = 0
   maxnum = A[0]

   while(i<len(A)):
        if(maxnum >= A[i]):
           maxnum = A[i]
           x = i
        i = i+1
   print(maxnum,"A[",x,"]")

lastmin_array()