[Tutor] Tips

[Alan Gauld]

On 18/06/14 01:15, Nanohard wrote:
>> On 2014-06-17 13:35, Alan Gauld wrote:
>>
>>> Don't test types, use the interface
>>
>> Can you please explain what you mean by this?
>
> He means use the Python interpreter, by going to your console and typing "python", or in Windows
> it's called 'IDLE'.


Nope, I meant what Mark and Danny said.

For example don't do this:

def add(a,b):
     if type(a) == int and type(b) == int:
        return a+b
     else:
        raise TypeError

Just do this:

def add(a,b):
     return a+b

And rely on the interpreter to check that a and b can be added.
It makes the function much more flexible and reusable.
You can now add strings, lists, floats etc, as well as ints


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