class TPyReturn

                        Python expression eval result


 Transport class for bringing objects from python (dynamically typed) to CINT
 (statically typed). It is best to immediately cast a TPyReturn to the real
 type, either implicitly (for builtin types) or explicitly (through a void*
 cast for pointers to ROOT objects).

 Examples:

  root [0] TBrowser* b = (void*)TPython::Eval( "ROOT.TBrowser()" );
  root [1] int i = TPython::Eval( "1+1" );
  root [2] i
  (int)2
  root [3] double d = TPython::Eval( "1+3.1415" );
  root [4] d
  (double)4.14150000000000063e+00

Function Members (Methods)

public:

	TPyReturn()
	TPyReturn(PyObject* pyobject)
	TPyReturn(const TPyReturn&)
virtual	~TPyReturn()
static TClass*	Class()
virtual TClass*	IsA() const
PyObject*	operator _object*() const
Char_t	operator Char_t() const
const char*	operator const char*() const
Double_t	operator Double_t() const
Float_t	operator Float_t() const
Int_t	operator Int_t() const
Long_t	operator Long_t() const
Short_t	operator Short_t() const
UInt_t	operator UInt_t() const
ULong_t	operator ULong_t() const
UShort_t	operator UShort_t() const
void*	operator void*() const
TPyReturn&	operator=(const TPyReturn&)
virtual void	ShowMembers(TMemberInspector& insp, char* parent)
virtual void	Streamer(TBuffer& b)
void	StreamerNVirtual(TBuffer& b)

Data Members

private:

PyObject*	fPyObject	! actual python object

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TPyReturn()

 Construct a TPyReturn object from Py_None.

TPyReturn( PyObject* pyobject )

 Construct a TPyReturn from a python object. The python object may represent
 a ROOT object. Steals reference to given python object.

TPyReturn( const TPyReturn& other )

 Copy constructor. Applies python object reference counting.

TPyReturn& operator=(const TPyReturn& )

 Assignment operator. Applies python object reference counting.

~TPyReturn()

 Destructor. Reference counting for the held python object is in effect.

operator const char*()

 Cast python return value to C-style string (may fail).

operator Char_t()

 Cast python return value to C++ char (may fail).

operator Long_t()

 Cast python return value to C++ long (may fail).

operator ULong_t()

 Cast python return value to C++ unsigned long (may fail).

operator Double_t()

 Cast python return value to to C++ double (may fail).

operator void*()

 Cast python return value to ROOT object with dictionary (may fail; note that
 you have to use the void* converter, as CINT will not call any other).

operator Int_t()

{ return (Int_t)operator Long_t(); }

operator Short_t()

{ return (Short_t)operator Long_t(); }

operator UInt_t()

{ return (UInt_t)operator ULong_t(); }

operator UShort_t()

{ return (UShort_t)operator ULong_t(); }

operator Float_t()

{ return (Float_t)operator Double_t(); }

Author: Wim Lavrijsen May 2004
Last change: root/pyroot:$Id: TPyReturn.h 22698 2008-03-18 01:02:02Z wlav $
Last generated: 2008-06-25 08:51

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