Not working

def maxvalue(list):
    # filters out only int and float from list:
    list_converted = []
    for j in range(len(list)):
        if type(list[j]) in (int, float):
            list_converted.append(list[j])
    maxvalue = list_converted[0]
    for i in list_converted[1:]:
        if list_converted[i] > maxvalue:
            maxvalue = list_converted[i]
    print("Your list was:\n" + str(list_converted) + "\nIts maximum numeric value is " + str(maxvalue) + ".")