Problems with conversion of values in strings to integers

[Jørgen Cederberg]

Peter Otten wrote:

> Jørgen Cederberg wrote:
> 
>> Hi,
>> 
>> using Python 2.2.1 on Windows and QNX I'm having trouble understandig
>> why int() raises a ValueError exception upon converting strings.
>> 
<snip examples of converting strings with int()>

>> 
>> This is quite frustating. The only solution I can see is to do:
>>  >>> int(float('10.1'))
>> 10
>> 
>> Is this the only solution or are there any other way to do this?
> 
> 
> There is more than one way to convert a string representing a fp number to
> an integer:
> 
>>>> int(float("1.999"))
> 1
> 
>>>> int(round(float("1.999")))
> 2
> 
> I think it's good that Python does not make the decision for you. Once you
> have decided which route to go you can easily wrap it into a helper
> function, e. g.
> 
> def toInt(s):
>     try:
>         return int(s)
>     except ValueError:
>         return int(round(float(s)))
> 
> (When dealing with user input, things are a little more complicated, as the
> decimal separator changes between locales)

Thanks a lot for the function. It solves the problem elegantly.

/Jorgen