converting a nested try/except statement into try/except/else

[John Salerno]

Boris Borcic wrote:
> Slawomir Nowaczyk wrote:
>>
>> try:
>>     if int(text) > 0:
>>        return True
>> except ValueError:
>>     pass
>> self.error_message()
>> return False
>>
> 
> Nicely DRY. To make it even more compact, it may be noticed that the 
> default return value None is false in a boolean context - so that the 
> last line is superfluous if the return value is only wanted to test it 
> in such a context.

In this case the method must return False, because it's a wxPython 
method that needs a True or False value. If it doesn't, the program will 
continue even after the error message.

What I did to make it compact was have the error_message() method return 
False, so I can just call

return self.error_message()