[Tutor] Question about conditions and empty values

[Alan Gauld]

On 26/10/13 20:13, Shelby Martin wrote:

> My question is this - the author of this exercise states the condition
> is False if either zero or "empty" is the value. I'm assuming he means
> that empty is just pressing Enter without entering a number?

Normally that would be correct but...

>
> money = int(input("How many dollars do you slip the Maitre D'?"))

Here we try to convert the string to an int. and int() fails
when given an empty string so your program never reaches the
if test.

Which begs the question: GHOw are you running your programs?
If you used a console or an IDE it should have shown you the error 
message which would have explained what and where things went wrong.

You would need to either use a try/except clause around the conversion 
or check for an empty string before converting. try/except is the 
preferred route but you may not have covered that yet.

> if money:
>      print("Ah, I am reminded of a table. Right this way.")
> else:
>      print("Please, sit. It may be a while.")

If you did get the error message then please, in future, include
any such in their entirety in posts because they greatly simplify 
diagnosing more complex issues.

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos