Quiz on Python Extensions

1. Which of the following defines Python Extensions correctly? 

1. On Unix machines, Python Extension modules usually end in which of the following extensions?

1. Which header file helps to link your module to the interpreter?

1. Which of the following is/are allowed signature(s) of module functions in C implementation?

1. Which of the following should we use to parse integer parameters in module functions?

1. How to return an integer variable “ans” from the module?

1. Consider the following python code snippet:

def addTwoOperands(op1, op2):

   return op1 + op2

Which of the following C implementation will provide the same functionality:

1. Map the correct format code for argument parsing:

Code    C type

1. C    i.  char*+
2. O    ii. Char*
3. S    iii. char
4. S#     iv. PyObject*

1. Which package is used for installing extensions in python?

1. Which of the following is the correct initialization function for the given C function and table mapping?

2. #include <Python.h>

   static PyObject* sampleFunc(PyObject* self) {

      return Py_BuildValue(“s”, “Hello Quizorbit”);

   }

   static PyMethodDef Sample_funcs[] = {

      {“sampleFunction “, (PyCFunction)sampleFunc,  METH_NOARGS, “sample function” },

         {NULL}

   };

1. Which of the following is the correct way to import a Python extension module named module_func?

1.  Which of the following is true about the given code snippet?

static PyObject *module_ func(PyObject *self, 

PyObject *args) {

   int op1;

   int op2;

   if (!PyArg_ParseTuple(args, “ii”, &op1, &op2)) {

      return NULL;

   }

   int temp= op1;

   op1= op2;

  op2 = temp;

   return Py_BuildValue(“i”, op1 – op2);

}   

1. Predict the output, when values 5 and 3 are passed as argument 1 and 2 respectively.

static PyObject *module_ func(PyObject *self, 

PyObject *args) {

   int op1;

   int op2;

   if (!PyArg_ParseTuple(args, “ii”, &op1, &op2)) {

      return NULL;

   }

   int temp= op1;

   op1= op2;

  op2 = temp;

   return Py_BuildValue(“i”, op1 – op2);

}   

1. Predict the output, when values 10 and 90 are passed as argument 1 and 2 respectively.

static PyObject *module_ func(PyObject *self, 

PyObject *args) {

   int op1;

   int op2;

   if (!PyArg_ParseTuple(args, “ii”, &op1, &op2)) {

      return NULL;

   }

   int temp= op1;

   op1= op2;

  op2 = temp;

   return Py_BuildValue(“i”, op1 – op2);

}   

1.  If we want the module_func to return the sum and difference of the two operands, what should the function’s return statement look like?

static PyObject *module_ func(PyObject *self, 

PyObject *args) {

   int op1;

   int op2;

   if (!PyArg_ParseTuple(args, “ii”, &op1, &op2)) {

      return NULL;

   }

   int temp= op1;

   op1= op2;

  op2 = temp;

   return Py_BuildValue(“i”, op1 – op2);

}