Loading module via full path

[Andre Poenitz]

Gary Herron <gherron at islandtraining.com> wrote:
> Andre Poenitz wrote:
>> Hi all.
>>
>> Is there a way to load a module given a full path to the module
>> without extending sys.path first?
>
> The standard module named "imp" can help you with this.

Thank you. I got stuck on http://docs.python.org/api/importing.html
(as I need it to be called from C(++)) and found no way to specify a path there
[and there aren't too many cross references in the python docs *sigh*]

I have now something similar to

class CPyObject
{
public:
  explicit CPyObject(PyObject * pObject) : m_pObject(pObject) { /*Check();*/ }
  ~CPyObject() { Py_XDECREF(m_pObject); }
  operator PyObject *() { return m_pObject; }
private:
  CPyObject(const CPyObject &);      // intentionally not implemented
  void operator=(const CPyObject &); // intentionally not implemented
  PyObject * m_pObject;
};

static PyObject * LoadModule(const char * mod, const char * path)
{
  CPyObject pyImpModule ( PyImport_Import(PyString_FromString("imp")) ); 

  CPyObject pyImpFindModuleFunc ( PyObject_GetAttrString(pyImpModule, "find_module") ); 
  CPyObject pyImpFindModuleArgs ( Py_BuildValue("s[s]", mod, path) );
  CPyObject pyImpFindModuleRes  ( PyObject_CallObject(pyImpFindModuleFunc, pyImpFindModuleArgs) ); 

  CPyObject pyImpLoadModuleFunc ( PyObject_GetAttrString(pyImpModule, "load_module") ); 
  CPyObject pyImpLoadModuleArgs ( Py_BuildValue("sOOO",
    mod,
    PyTuple_GetItem(pyImpFindModuleRes, 0),
    PyTuple_GetItem(pyImpFindModuleRes, 1),
    PyTuple_GetItem(pyImpFindModuleRes, 2)
  )); 
  return PyObject_CallObject(pyImpLoadModuleFunc, pyImpLoadModuleArgs);
}

which seems to do what I want even if it looks a bit too verbose for my taste and I
don't know whether I go the reference counting right.

Thanks for the hint,
Andre'