[Tutor] Beginner problem: name 'convertToFahrenheit' is not defined

[Josh Rosen]

In Python, def is an executable statement.  Your function is not  
defined until the def statement is run by Python.  If you move your  
function definitions earlier in the code so that your functions are  
defined before they're used, this code will run properly.

Josh R.

On Aug 14, 2008, at 4:08 PM, Joseph Bae wrote:

> Hi all,
>
> I'm new to Python (and programming in general) and need some help!
>
> Here is my code so far for a temperature conversion program  
> (converts between Fahrenheit and Celsius):
>
>
>
> temp = input("Enter A Number : ")
> convertTo = raw_input("Convert To (F)ahrenheit or (C)elsius? : ")
>
> if convertTo == "F":
>     convertedTemp = convertToFahrenheit(temp)
>     print "%d Celsius = %d Fahrenheit" % (temp, convertedTemp)
> else:
>     convertedTemp = convertToCelsius(temp)
>     print "%d Fahrenheit = %d Celsius" % (temp, convertedTemp)
>
> def convertToFahrenheit(t):
>     tF = (9.0/5.0) * (t + 32)
>     return tF
>
> def convertToCelsius(t):
>     tC = (9.0/5.0) * (t - 32)
>     return tC
>
>
>
> It worked fine without having extra functions but once I put  
> convertToFahrenheit and convertToCelsius in (just for practice  
> really), this happened:
>
> Enter A Number : 50
> Convert to (F)ahrenheit or (C)elsius? : F
> Traceback (most recent call last):
>      File "TemperatureConverter.py", line 5, in <module>
>           convertedTemp = convertToFahrenheit(temp)
> NameError: name 'convertToFahrenheit' is not defined
>
> This is most likely a very simple error, but can someone please  
> clarify for me why it's behaving this way?
>
> Thanks!
>
> Joe
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