On 2016-08-29 18:30, Ganesh Pal wrote:
Hello Team ,
I need you input on the below hello world program. I a m trying to add a
python binding which will return the character for the given index . I am
on Python 2.7 and linux
Example :
string ='helloworld'
dda_hello(5)
'w'
/*
+ * Hello world example for python bindings
+ */
+
+static char* string = "helloworld";
+char dda_hello(int i)
+ {
+ return string[i];
+ }
+
+static PyObject *
+py_dda_hello(PyObject *self, PyObject *args )
+{
+ int index;
+ char char1;
+ if (!PyArg_ParseTuple(args, "i", &index))
+ return NULL;
+ char1 = dda_hello(index);
This bit is wrong:
+ return Py_BuildValue("s",char1);
The format "s" is for a null-terminated C string (char *), but you're
giving it a C int.
The format you should be using is "c" (C int representing a character).
+}
+
+/*
@@ -1674,6 +1705,10 @@ PyMethodDef xyz_methods[] = {
+ {"dda_hello", py_dda_hello, METH_VARARGS,
+ "Returns the character entered for a given index"},
import as.ds.dss as daa
print dda.dda_hello(1)
zsh: segmentation fault (core dumped) python
Apologies for posting the diff , I didn't find a better way
It would be a good idea to check the index and raise an exception if
it's out the bounds.
--
https://mail.python.org/mailman/listinfo/python-list
