[Tutor] Paper Rock Scissors game - User's choice not returned properly

[Peter Otten]

Alan Gauld wrote:

> On 31/10/11 20:22, Peter Otten wrote:
>> Alan Gauld wrote:
>>
>>> if choice.lower() not in ('prs'): # NB use a single string
>>
>> That's not a good idea. If a user accidentally enters PR (for example)
>> your version will mistake that for a valid choice.
> 
> Good point, although  you could test the first character only...
> 
> if choice[0].lower() not in ('prs'): # NB use a single string

What Steven says, plus you may run into an IndexError if choice is the empty 
string. If you absolutely want to test against a single string you have to 
check the length first.