input python

while True: ##loop forever
    try: #tries the lines
        x = input('enter paitent weight in Kg>') #get the users input
        x = float(x) # converts the input to a float (floating point number, example: 0.1)
        break #break out of the while loop
    except: #if the tried lines had an error then this runs instead
        print("sorry {} was not a number, please try again".format(x)) #simple print statement with variables

if isinstance(x, float): #checks to make sure a variable is of a certian type
    print(x)#prints the varialbe