PyArg_Parse weirds

[Robin Becker]

In article <3AE5AD13.2090A47E at letterror.com>, Just van Rossum
<just at letterror.com> writes
>Robin Becker wrote:
>
>> OK I figured out that PyArg_Parse seems to know about an existing error so I 
>needed to
>> clear the existing error condition with PyErr_Clear ie
>> 
>>         else if(PyObject_HasAttrString(value,"red")
>>                         && PyObject_HasAttrString(value,"green")
>>                         && PyObject_HasAttrString(value,"blue")){
>>                 double  r, g, b;
>>                 PyObject *v;
>>                 PyErr_Clear();  /*needed this here else i==0 in pyArg_Parse 
>call*/
>>                 v = PyObject_GetAttrString(value,"red");
>>                 i = PyArg_Parse(v,"d",&r);
>
>Wouldn't it make sense to figure out where the original exception is raised, and
>clear it there? Now it looks like you're possibly masking a real error.
>
>Just
no I was testing for another possible value and when that fails I try a
secondd argument type; I just didn't realise that PyArg_Parse would barf
if an error was already set.
-- 
Robin Becker