Temperature converter script in Python

def c2f(t): return (t*9/5.0)+32 def c2k(t): return t+273.15 def f2c(t): return (t-32)*5.0/9 def f2k(t): return (t+459.67)*5.0/9 def k2c(t): return t-273.15 def k2f(t): return (t*9/5.0)-459.67 def get_user_input(): user_input = 0 while type(user_input) != type(1.0): user_input = raw_input("Enter degrees to convert: ") try: user_input = float(user_input) except: print user_input + " is not a valid entry" return user_input def main(): menu = "\nTemperature Convertor\n\n"+\ "1. Celsius to Fahrenheit\n"+\ "2. Celsius to Kelvin\n"+\ "3. Fahrenheit to Celsius\n"+\ "4. Fahrenheit to Kelvin\n"+\ "5. Kelvin to Celsius\n"+\ "6. Kelvin to Fahrenheit\n"+\ "7. Quit" user_input = 0 while user_input != 7: print menu user_input = raw_input("Please enter a valid selection: ") try: user_input = int(user_input) except: print user_input + " is not a valid selction, please try again\n" if user_input == 1: t = get_user_input() print str(t) + " degree Celsius is " + str((c2f(t))) + " degree Fahrenheit" elif user_input == 2: t = get_user_input() print str(t) + " degree Celsius is " + str((c2k(t))) + " degree Kelvin" elif user_input == 3: t = get_user_input() print str(t) + " degree Fahrenheit is " + str((f2c(t))) + " degree Celsius" elif user_input == 4: t = get_user_input() print str(t) + " degree Fahrenheit is " + str((f2k(t))) + " degree Kelvin" elif user_input == 5: t = get_user_input() print str(t) + " degree Kelvin is " + str((k2c(t))) + " degree Celsius" elif user_input == 6: t = get_user_input() print str(t) + " degree Kelvin is " + str((k2f(t))) + " degree Fahrenheit" elif user_input == 7: quit() else: print str(user_input) + " is not a valid selection, please try again\n" if __name__ == "__main__": main()