NumPy (numarray) problem with C code

Marc Schellens m_schellens at
Wed Mar 10 11:00:15 CET 2004

Following the NumPy documentation, I took over some C code,
but run into an error.
Does anybody have a suggestion?

gdlpython.cpp:225: `PyArray_Type' undeclared (first use this function)

#include <python2.3/Python.h>
// python numarray is used
#include <python2.3/numarray/arrayobject.h>

// ...

BaseGDL* FromPython( PyObject* pyObj)
   PyObject *object;

// following is line 225
   if( !PyArg_ParseTuple(pyObj, "O!", &PyArray_Type, &object))

// please forget the rest or have a look and tell me if that will work
// like I expect or if there is an obvious mistake
// its my first time to interface to python

       // non-array - try other
       // string
       char* s;
       if( PyArg_ParseTuple(pyObj, "s", s))
	return new DStringGDL( string(s));
       // integer
       DLong l;
       if( PyArg_ParseTuple(pyObj, "l", &l))
	return new DLongGDL( l);
       // complex
       Py_complex c;
       if( PyArg_ParseTuple(pyObj, "D", &c))
	  DComplexDbl cc( c.real, c.imag);
	  return new DComplexDblGDL( cc);
       // float
       DDouble d;
       if( PyArg_ParseTuple(pyObj, "d", &d))
	return new DDoubleGDL( d);

       throw GDLException( "FromPython: Cannot convert python object.") ;

   // array type
   PyArrayObject* array = (PyArrayObject*) object;

   int nDim = array->nd;
   int item_type = array->descr->type_num;

   // make array contiguous
//   array = static_cast< PyArrayObject*>
//     (PyArray_ContiguousFromObject( object,
// 				   item_type,
// 				   0,0));
   array = (PyArrayObject*) PyArray_ContiguousFromObject( object,
   if( array == NULL)
     throw GDLException( "FromPython: Error making array contiguous.") ;

   size_t dimArr[ MAXRANK];
   if( nDim > MAXRANK)
     Warning( "FromPython: Array has more than "+MAXRANK_STR+
	     " dimensions. Extending last one.");
     size_t lastDim = array->dimensions[ MAXRANK-1];
     for( size_t i=MAXRANK; i<nDim; ++i) lastDim *= array->dimensions[ i];
     for( size_t i=0; i<MAXRANK-1; ++i)
       dimArr[ i] = array->dimensions[ i];
     dimArr[ MAXRANK-1] = lastDim;
     nDim = MAXRANK;
       for( size_t i=0; i<nDim; ++i)
	dimArr[ i] = array->dimensions[ i];

   dimension dim( dimArr, nDim);

   switch( item_type)
       // case PyArray_NOTYPE:  //UNDEF***
     case PyArray_UBYTE:   //BYTE
       return NewFromPyArrayObject< DByteGDL>( dim, array);
     case PyArray_SHORT:   //INT
       return NewFromPyArrayObject< DIntGDL>( dim, array);
     case PyArray_INT:     //LONG	
       return NewFromPyArrayObject< DLongGDL>( dim, array);
     case PyArray_FLOAT:   //FLOAT	
       return NewFromPyArrayObject< DFloatGDL>( dim, array);
     case PyArray_DOUBLE:  //DOUBLE	
       return NewFromPyArrayObject< DDoubleGDL>( dim, array);
     case PyArray_CFLOAT:  //COMPLEX	
       return NewFromPyArrayObject< DComplexGDL>( dim, array);
       // case PyArray_NOTYPE:  //STRING***	
       // case PyArray_NOTYPE:  //STRUCT***	
     case PyArray_CDOUBLE: //COMPLEXDBL	
       return NewFromPyArrayObject< DComplexDblGDL>( dim, array);
       // case PyArray_NOTYPE:  //PTR***		
       // case PyArray_NOTYPE:  //OBJECT***
     case tUInt16:         //UINT*
       return NewFromPyArrayObject< DUIntGDL>( dim, array);
     case tUInt32:         //ULONG*
       return NewFromPyArrayObject< DULongGDL>( dim, array);
       throw GDLException( "FromPython: Unknown array type.") ;

   return NULL; // compiler shut-up

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