number input filter

num = ""#starts as empty string
neg = False
while type(num) == str:#loops so long as input remains string (cannot parse to int / float)
    num = input("Enter a number: ").strip()#new input
    if num[0] == "-":#check for negative number
        neg = True
        num = num[1:]#remove negative sign
    if num.isnumeric():#if can be parsed into int
        num = int(num)
    elif num.count(".") == 1 and num.replace(".","").isnumeric():#if has only one '.' and once removed can be parsed into int
        num = float(num)
    else:
        print("Invalid input, try again")
        neg = False#if invalid input started with '-', set negative back to false for the next number
if neg:
    num = num*-1# if number was negative, add back negative sign by multiplying (-1)
print("{}({})".format(str(type(num))[8:-2],num))#prints result as number, cast into class