Re: Decimal separator from python to C

On 28.03.2012 03:04, M. wrote:
> Hey,
>
> 2012/3/27 niki<[email protected]>:
>> On 26.03.2012 23:32, M. wrote:
>>>
>>> Hi all,
>>>
>>> I'm using ctypes as a wrapper from a Pyside program to a C program.
>>> Everything goes smoothly till I have to pass values to the C function.
>>> The C function receive the values correctly when using
>>> ctypes.c_double(), but the separator _inside_ the C code changed from
>>> . to , and that is REALLY weird. Printing the data from python it
>>> shows that is a float, and inside the C code everything is declared
>>> accordingly. printf inside the C code shows a comma , as the
>>> separator, while a C code compiled using the same compiler on the same
>>> system shows period . as the separator. Any clues? My locale is
>>> pt_BR-UTF-8.
>>
>>
>> Python sets locale as requested by user/os e.g. "pt_BR-UTF-8".
>> Try to set it back to "C".
>
> I'll try, but a C program with the same locale defined on the system
> gives the correct output. And a standard python program represents
> floating point variables using a period. How come ctypes would pass
> the variables to the C code using a comma?

ctypes.c_double is binary number and has no ascii content.
Minimal C programs usually don't set locale.

Niki

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