Python program to o Capture String Errors

x = input("Insert numbers only: ")
while type(x) != float:
 try:
    x = float(x)
 except ValueError:
     print("Error! Please insert only numbers...")
 x = input("Insert numbers only: ")
print(x/2)

Insert numbers only: 123d
Error! Please insert only numbers...
Insert numbers only: 123
Insert numbers only: 3
Insert numbers only: 78
Insert numbers only: hfg
Error! Please insert only numbers...
Insert numbers only: