Generic Abstract Object Interface

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+#ifndef Py_ABSTRACTOBJECT_H
+#define Py_ABSTRACTOBJECT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/***********************************************************
+Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
+The Netherlands.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* Abstract Object Interface (many thanks to Jim Fulton) */
+
+/*
+   PROPOSAL: A Generic Python Object Interface for Python C Modules
+
+Problem
+
+  Python modules written in C that must access Python objects must do
+  so through routines whose interfaces are described by a set of
+  include files.  Unfortunately, these routines vary according to the
+  object accessed.  To use these routines, the C programmer must check
+  the type of the object being used and must call a routine based on
+  the object type.  For example, to access an element of a sequence,
+  the programmer must determine whether the sequence is a list or a
+  tuple:
+
+    if(is_tupleobject(o))
+      e=gettupleitem(o,i)
+    else if(is_listitem(o))
+      e=getlistitem(o,i)
+
+  If the programmer wants to get an item from another type of object
+  that provides sequence behavior, there is no clear way to do it
+  correctly.  
+
+  The persistent programmer may peruse object.h and find that the
+  _typeobject structure provides a means of invoking up to (currently
+  about) 41 special operators.  So, for example, a routine can get an
+  item from any object that provides sequence behavior. However, to
+  use this mechanism, the programmer must make their code dependent on
+  the current Python implementation.
+
+  Also, certain semantics, especially memory management semantics, may
+  differ by the type of object being used.  Unfortunately, these
+  semantics are not clearly described in the current include files.
+  An abstract interface providing more consistent semantics is needed. 
+
+Proposal
+
+  I propose the creation of a standard interface (with an associated
+  library of routines and/or macros) for generically obtaining the
+  services of Python objects.  This proposal can be viewed as one
+  components of a Python C interface consisting of several components.
+
+  From the viewpoint of of C access to Python services, we have (as
+  suggested by Guido in off-line discussions):
+
+  - "Very high level layer": two or three functions that let you exec or
+    eval arbitrary Python code given as a string in a module whose name is
+    given, passing C values in and getting C values out using
+    mkvalue/getargs style format strings.  This does not require the user
+    to declare any variables of type "PyObject *".  This should be enough
+    to write a simple application that gets Python code from the user,
+    execs it, and returns the output or errors.  (Error handling must also
+    be part of this API.)
+
+  - "Abstract objects layer": which is the subject of this proposal.
+    It has many functions operating on objects, and lest you do many
+    things from C that you can also write in Python, without going
+    through the Python parser.
+
+  - "Concrete objects layer": This is the public type-dependent
+    interface provided by the standard built-in types, such as floats,
+    strings, and lists.  This interface exists and is currently
+    documented by the collection of include files provides with the
+    Python distributions.
+
+  From the point of view of Python accessing services provided by C
+  modules: 
+
+  - "Python module interface": this interface consist of the basic
+    routines used to define modules and their members.  Most of the
+    current extensions-writing guide deals with this interface.
+
+  - "Built-in object interface": this is the interface that a new
+    built-in type must provide and the mechanisms and rules that a
+    developer of a new built-in type must use and follow.
+
+  This proposal is a "first-cut" that is intended to spur
+  discussion. See especially the lists of notes.
+
+  The Python C object interface will provide four protocols: object,
+  numeric, sequence, and mapping.  Each protocol consists of a
+  collection of related operations.  If an operation that is not
+  provided by a particular type is invoked, then a standard exception,
+  NotImplementedError is raised with a operation name as an argument.
+  In addition, for convenience this interface defines a set of
+  constructors for building objects of built-in types.  This is needed
+  so new objects can be returned from C functions that otherwise treat
+  objects generically.
+
+Memory Management
+
+  For all of the functions described in this proposal, if a function
+  retains a reference to a Python object passed as an argument, then the
+  function will increase the reference count of the object.  It is
+  unnecessary for the caller to increase the reference count of an
+  argument in anticipation of the object's retention.
+
+  All Python objects returned from functions should be treated as new
+  objects.  Functions that return objects assume that the caller will
+  retain a reference and the reference count of the object has already
+  been incremented to account for this fact.  A caller that does not
+  retain a reference to an object that is returned from a function
+  must decrement the reference count of the object (using
+  DECREF(object)) to prevent memory leaks.
+
+  Note that the behavior mentioned here is different from the current
+  behavior for some objects (e.g. lists and tuples) when certain
+  type-specific routines are called directly (e.g. setlistitem).  The
+  proposed abstraction layer will provide a consistent memory
+  management interface, correcting for inconsistent behavior for some
+  built-in types.
+
+Protocols
+
+xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
+
+/*  Object Protocol: */
+
+     /* Implemented elsewhere:
+
+     int PyObject_Print(PyObject *o, FILE *fp, int flags);
+
+         Print an object, o, on file, fp.  Returns -1 on
+	 error.  The flags argument is used to enable certain printing
+	 options. The only option currently supported is Py_Print_RAW. 
+
+         (What should be said about Py_Print_RAW?)	
+
+       */
+
+     /* Implemented elsewhere:
+
+     int PyObject_HasAttrString(PyObject *o, char *attr_name);
+
+         Returns 1 if o has the attribute attr_name, and 0 otherwise.
+	 This is equivalent to the Python expression:
+	 hasattr(o,attr_name). 
+
+	 This function always succeeds.
+
+       */
+
+     /* Implemented elsewhere:
+
+     PyObject* PyObject_GetAttrString(PyObject *o, char *attr_name);
+
+	 Retrieve an attributed named attr_name form object o.
+	 Returns the attribute value on success, or NULL on failure.
+	 This is the equivalent of the Python expression: o.attr_name.
+
+       */
+
+     /* Implemented elsewhere:
+
+     int PyObject_HasAttr(PyObject *o, PyObject *attr_name);
+
+         Returns 1 if o has the attribute attr_name, and 0 otherwise.
+	 This is equivalent to the Python expression:
+	 hasattr(o,attr_name). 
+
+	 This function always succeeds.
+
+       */
+
+     /* Implemented elsewhere:
+
+     PyObject* PyObject_GetAttr(PyObject *o, PyObject *attr_name);
+
+	 Retrieve an attributed named attr_name form object o.
+	 Returns the attribute value on success, or NULL on failure.
+	 This is the equivalent of the Python expression: o.attr_name.
+
+       */
+
+
+     /* Implemented elsewhere:
+
+     int PyObject_SetAttrString(PyObject *o, char *attr_name, PyObject *v);
+
+	 Set the value of the attribute named attr_name, for object o,
+	 to the value, v. Returns -1 on failure.  This is
+	 the equivalent of the Python statement: o.attr_name=v.
+
+       */
+
+     /* Implemented elsewhere:
+
+     int PyObject_SetAttr(PyObject *o, PyObject *attr_name, PyObject *v);
+
+	 Set the value of the attribute named attr_name, for object o,
+	 to the value, v. Returns -1 on failure.  This is
+	 the equivalent of the Python statement: o.attr_name=v.
+
+       */
+
+     /* implemented as a macro:
+
+     int PyObject_DelAttrString(PyObject *o, char *attr_name);
+
+	 Delete attribute named attr_name, for object o. Returns
+	 -1 on failure.  This is the equivalent of the Python
+	 statement: del o.attr_name.
+
+       */
+#define  PyObject_DelAttrString(O,A) PyObject_SetAttrString((O),(A),NULL)
+
+     /* implemented as a macro:
+
+     int PyObject_DelAttr(PyObject *o, PyObject *attr_name);
+
+	 Delete attribute named attr_name, for object o. Returns -1
+	 on failure.  This is the equivalent of the Python
+	 statement: del o.attr_name.
+
+       */
+#define  PyObject_DelAttr(O,A) PyObject_SetAttr((O),(A),NULL)
+
+     int PyObject_Cmp(PyObject *o1, PyObject *o2, int *result);
+
+       /*
+	 Compare the values of o1 and o2 using a routine provided by
+	 o1, if one exists, otherwise with a routine provided by o2.
+	 The result of the comparison is returned in result.  Returns
+	 -1 on failure.  This is the equivalent of the Python
+	 statement: result=cmp(o1,o2).
+
+       */
+
+     /* Implemented elsewhere:
+
+     int PyObject_Compare(PyObject *o1, PyObject *o2);
+
+	 Compare the values of o1 and o2 using a routine provided by
+	 o1, if one exists, otherwise with a routine provided by o2.
+	 Returns the result of the comparison on success.  On error,
+	 the value returned is undefined. This is equivalent to the
+	 Python expression: cmp(o1,o2).
+
+       */
+
+     /* Implemented elsewhere:
+
+     PyObject *PyObject_Repr(PyObject *o);
+
+	 Compute the string representation of object, o.  Returns the
+	 string representation on success, NULL on failure.  This is
+	 the equivalent of the Python expression: repr(o).
+
+	 Called by the repr() built-in function and by reverse quotes.
+
+       */
+
+     /* Implemented elsewhere:
+
+     PyObject *PyObject_Str(PyObject *o);
+
+	 Compute the string representation of object, o.  Returns the
+	 string representation on success, NULL on failure.  This is
+	 the equivalent of the Python expression: str(o).)
+
+	 Called by the str() built-in function and by the print
+	 statement.
+
+       */
+
+     int PyCallable_Check(PyObject *o);
+
+       /*
+	 Determine if the object, o, is callable.  Return 1 if the
+	 object is callable and 0 otherwise.
+
+	 This function always succeeds.
+
+       */
+
+
+     
+     PyObject *PyObject_CallObject(PyObject *callable_object, PyObject *args);
+
+       /*
+
+	 Call a callable Python object, callable_object, with
+	 arguments given by the tuple, args.  If no arguments are
+	 needed, then args may be NULL.  Returns the result of the
+	 call on success, or NULL on failure.  This is the equivalent
+	 of the Python expression: apply(o,args).
+
+       */
+
+     PyObject *PyObject_CallFunction(PyObject *callable_object, char *format, ...);
+
+       /*
+	 Call a callable Python object, callable_object, with a
+	 variable number of C arguments. The C arguments are described
+	 using a mkvalue-style format string. The format may be NULL,
+	 indicating that no arguments are provided.  Returns the
+	 result of the call on success, or NULL on failure.  This is
+	 the equivalent of the Python expression: apply(o,args).
+
+       */
+
+
+     PyObject *PyObject_CallMethod(PyObject *o, char *m, char *format, ...);
+
+       /*
+	 Call the method named m of object o with a variable number of
+	 C arguments.  The C arguments are described by a mkvalue
+	 format string.  The format may be NULL, indicating that no
+	 arguments are provided. Returns the result of the call on
+	 success, or NULL on failure.  This is the equivalent of the
+	 Python expression: o.method(args).
+
+         Note that Special method names, such as "__add__",
+	 "__getitem__", and so on are not supported. The specific
+	 abstract-object routines for these must be used.
+
+       */
+
+
+     /* Implemented elsewhere:
+
+     long PyObject_Hash(PyObject *o);
+
+         Compute and return the hash, hash_value, of an object, o.  On
+	 failure, return -1.  This is the equivalent of the Python
+	 expression: hash(o).
+
+       */
+
+
+     /* Implemented elsewhere:
+
+     int PyObject_IsTrue(PyObject *o);
+
+	 Returns 1 if the object, o, is considered to be true, and
+	 0 otherwise. This is equivalent to the Python expression:
+	 not not o
+
+	 This function always succeeds.
+	 
+       */
+
+     PyObject *PyObject_Type(PyObject *o);
+
+       /*
+	 On success, returns a type object corresponding to the object
+	 type of object o. On failure, returns NULL.  This is
+	 equivalent to the Python expression: type(o).
+       */
+
+     int PyObject_Length(PyObject *o);
+
+       /*
+         Return the length of object o.  If the object, o, provides
+	 both sequence and mapping protocols, the sequence length is
+	 returned. On error, -1 is returned.  This is the equivalent
+	 to the Python expression: len(o).
+
+       */
+
+     PyObject *PyObject_GetItem(PyObject *o, PyObject *key);
+
+       /*
+	 Return element of o corresponding to the object, key, or NULL
+	 on failure. This is the equivalent of the Python expression:
+	 o[key].
+
+       */
+
+     int PyObject_SetItem(PyObject *o, PyObject *key, PyObject *v);
+
+       /*
+	 Map the object, key, to the value, v.  Returns
+	 -1 on failure.  This is the equivalent of the Python
+	 statement: o[key]=v.
+       */
+
+
+/*  Number Protocol:*/
+
+     int PyNumber_Check(PyObject *o);
+
+       /*
+         Returns 1 if the object, o, provides numeric protocols, and
+	 false otherwise. 
+
+	 This function always succeeds.
+
+       */
+
+     PyObject *PyNumber_Add(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of adding o1 and o2, or null on failure.
+	 This is the equivalent of the Python expression: o1+o2.
+
+
+       */
+
+     PyObject *PyNumber_Subtract(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of subtracting o2 from o1, or null on
+	 failure.  This is the equivalent of the Python expression:
+	 o1-o2.
+
+       */
+
+     PyObject *PyNumber_Multiply(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of multiplying o1 and o2, or null on
+	 failure.  This is the equivalent of the Python expression:
+	 o1*o2.
+
+
+       */
+
+     PyObject *PyNumber_Divide(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of dividing o1 by o2, or null on failure.
+	 This is the equivalent of the Python expression: o1/o2.
+
+
+       */
+
+     PyObject *PyNumber_Remainder(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the remainder of dividing o1 by o2, or null on
+	 failure.  This is the equivalent of the Python expression:
+	 o1%o2.
+
+
+       */
+
+     PyObject *PyNumber_Divmod(PyObject *o1, PyObject *o2);
+
+       /*
+	 See the built-in function divmod.  Returns NULL on failure.
+	 This is the equivalent of the Python expression:
+	 divmod(o1,o2).
+
+
+       */
+
+     PyObject *PyNumber_Power(PyObject *o1, PyObject *o2, PyObject *o3);
+
+       /*
+	 See the built-in function pow.  Returns NULL on failure.
+	 This is the equivalent of the Python expression:
+	 pow(o1,o2,o3), where o3 is optional.
+
+       */
+
+     PyObject *PyNumber_Negative(PyObject *o);
+
+       /*
+	 Returns the negation of o on success, or null on failure.
+	 This is the equivalent of the Python expression: -o.
+
+       */
+
+     PyObject *PyNumber_Positive(PyObject *o);
+
+       /*
+         Returns the (what?) of o on success, or NULL on failure.
+	 This is the equivalent of the Python expression: +o.
+
+       */
+
+     PyObject *PyNumber_Absolute(PyObject *o);
+
+       /*
+	 Returns the absolute value of o, or null on failure.  This is
+	 the equivalent of the Python expression: abs(o).
+
+       */
+
+     PyObject *PyNumber_Invert(PyObject *o);
+
+       /*
+	 Returns the bitwise negation of o on success, or NULL on
+	 failure.  This is the equivalent of the Python expression:
+	 ~o.
+
+
+       */
+
+     PyObject *PyNumber_Lshift(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of left shifting o1 by o2 on success, or
+	 NULL on failure.  This is the equivalent of the Python
+	 expression: o1 << o2.
+
+
+       */
+
+     PyObject *PyNumber_Rshift(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of right shifting o1 by o2 on success, or
+	 NULL on failure.  This is the equivalent of the Python
+	 expression: o1 >> o2.
+
+       */
+
+     PyObject *PyNumber_And(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result of "anding" o2 and o2 on success and NULL
+	 on failure. This is the equivalent of the Python
+	 expression: o1 and o2.
+
+
+       */
+
+     PyObject *PyNumber_Xor(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the bitwise exclusive or of o1 by o2 on success, or
+	 NULL on failure.  This is the equivalent of the Python
+	 expression: o1^o2.
+
+
+       */
+
+     PyObject *PyNumber_Or(PyObject *o1, PyObject *o2);
+
+       /*
+	 Returns the result or o1 and o2 on success, or NULL on
+	 failure.  This is the equivalent of the Python expression: 
+	 o1 or o2.
+
+       */
+
+     /* Implemented elsewhere:
+
+     int PyNumber_Coerce(PyObject *o1, PyObject *o2);
+
+         On success, returns a tuple containing o1 and o2 converted to
+	 a common numeric type, or None if no conversion is possible.
+	 Returns -1 on failure. This is equivalent to the Python
+	 expression: coerce(o1,o2).
+
+       */
+
+     PyObject *PyNumber_Int(PyObject *o);
+
+       /*
+	 Returns the o converted to an integer object on success, or
+	 NULL on failure.  This is the equivalent of the Python
+	 expression: int(o).
+
+       */
+
+     PyObject *PyNumber_Long(PyObject *o);
+
+       /*
+	 Returns the o converted to a long integer object on success,
+	 or NULL on failure.  This is the equivalent of the Python
+	 expression: long(o).
+
+       */
+
+     PyObject *PyNumber_Float(PyObject *o);
+
+       /*
+	 Returns the o converted to a float object on success, or NULL
+	 on failure.  This is the equivalent of the Python expression:
+	 float(o).
+       */
+	 
+
+/*  Sequence protocol:*/
+
+     int PySequence_Check(PyObject *o);
+
+       /*
+         Return 1 if the object provides sequence protocol, and zero
+	 otherwise.  
+
+	 This function always succeeds.
+
+       */
+
+     PyObject *PySequence_Concat(PyObject *o1, PyObject *o2);
+
+       /*
+	 Return the concatination of o1 and o2 on success, and NULL on
+	 failure.   This is the equivalent of the Python
+	 expression: o1+o2.
+
+       */
+
+     PyObject *PySequence_Repeat(PyObject *o, int count);
+
+       /*
+	 Return the result of repeating sequence object o count times,
+	 or NULL on failure.  This is the equivalent of the Python
+	 expression: o1*count.
+
+       */
+
+     PyObject *PySequence_GetItem(PyObject *o, int i);
+
+       /*
+	 Return the ith element of o, or NULL on failure. This is the
+	 equivalent of the Python expression: o[i].
+
+       */
+
+     PyObject *PySequence_GetSlice(PyObject *o, int i1, int i2);
+
+       /*
+	 Return the slice of sequence object o between i1 and i2, or
+	 NULL on failure. This is the equivalent of the Python
+	 expression: o[i1:i2].
+
+       */
+
+     int PySequence_SetItem(PyObject *o, int i, PyObject *v);
+
+       /*
+	 Assign object v to the ith element of o.  Returns
+	 -1 on failure.  This is the equivalent of the Python
+	 statement: o[i]=v.
+
+       */
+
+     int PySequence_SetSlice(PyObject *o, int i1, int i2, PyObject *v);
+
+       /*
+         Assign the sequence object, v, to the slice in sequence
+	 object, o, from i1 to i2.  Returns -1 on failure. This is the
+	 equivalent of the Python statement: o[i1:i2]=v.
+       */
+
+     PyObject *PySequence_Tuple(PyObject *o);
+
+       /*
+	 Returns the o as a tuple on success, and NULL on failure.
+	 This is equivalent to the Python expression: tuple(o)
+       */
+
+     int PySequence_Count(PyObject *o, PyObject *value);
+
+       /*
+         Return the number of occurrences on value on o, that is,
+	 return the number of keys for which o[key]==value.  On
+	 failure, return -1.  This is equivalent to the Python
+	 expression: o.count(value).
+       */
+
+     int PySequence_In(PyObject *o, PyObject *value);
+
+       /*
+	 Determine if o contains value.  If an item in o is equal to
+	 X, return 1, otherwise return 0.  On error, return -1.  This
+	 is equivalent to the Python expression: value in o.
+       */
+
+     int PySequence_Index(PyObject *o, PyObject *value);
+
+       /*
+	 Return the first index for which o[i]=value.  On error,
+	 return -1.    This is equivalent to the Python
+	 expression: o.index(value).
+       */
+
+/*  Mapping protocol:*/
+
+     int PyMapping_Check(PyObject *o);
+
+       /*
+         Return 1 if the object provides mapping protocol, and zero
+	 otherwise.  
+
+	 This function always succeeds.
+       */
+
+     int PyMapping_Length(PyObject *o);
+
+       /*
+         Returns the number of keys in object o on success, and -1 on
+	 failure.  For objects that do not provide sequence protocol,
+	 this is equivalent to the Python expression: len(o).
+       */
+
+     int PyMapping_DelItemString(PyObject *o, char *key);
+
+       /*
+	 Remove the mapping for object, key, from the object *o.
+	 Returns -1 on failure.  This is equivalent to
+	 the Python statement: del o[key].
+       */
+
+     int PyMapping_DelItem(PyObject *o, PyObject *key);
+
+       /*
+	 Remove the mapping for object, key, from the object *o.
+	 Returns -1 on failure.  This is equivalent to
+	 the Python statement: del o[key].
+       */
+
+     int PyMapping_HasKeyString(PyObject *o, char *key);
+
+       /*
+	 On success, return 1 if the mapping object has the key, key,
+	 and 0 otherwise.  This is equivalent to the Python expression:
+	 o.has_key(key). 
+
+	 This function always succeeds.
+       */
+
+     int PyMapping_HasKey(PyObject *o, PyObject *key);
+
+       /*
+	 Return 1 if the mapping object has the key, key,
+	 and 0 otherwise.  This is equivalent to the Python expression:
+	 o.has_key(key). 
+
+	 This function always succeeds.
+
+       */
+
+     /* Implemented as macro:
+
+     PyObject *PyMapping_Keys(PyObject *o);
+
+         On success, return a list of the keys in object o.  On
+	 failure, return NULL. This is equivalent to the Python
+	 expression: o.keys().
+       */
+#define PyMapping_Keys(O) PyObject_CallMethod(O,"keys",NULL)
+
+     /* Implemented as macro:
+
+     PyObject *PyMapping_Values(PyObject *o);
+
+         On success, return a list of the values in object o.  On
+	 failure, return NULL. This is equivalent to the Python
+	 expression: o.values().
+       */
+#define PyMapping_Values(O) PyObject_CallMethod(O,"values",NULL)
+
+     /* Implemented as macro:
+
+     PyObject *PyMapping_Items(PyObject *o);
+
+         On success, return a list of the items in object o, where
+	 each item is a tuple containing a key-value pair.  On
+	 failure, return NULL. This is equivalent to the Python
+	 expression: o.items().
+
+       */
+#define PyMapping_Items(O) PyObject_CallMethod(O,"items",NULL)
+
+     PyObject *PyMapping_GetItemString(PyObject *o, char *key);
+
+       /*
+	 Return element of o corresponding to the object, key, or NULL
+	 on failure. This is the equivalent of the Python expression:
+	 o[key].
+       */
+
+     int PyMapping_SetItemString(PyObject *o, char *key, PyObject *value);
+
+       /*
+	 Map the object, key, to the value, v.  Returns 
+	 -1 on failure.  This is the equivalent of the Python
+	 statement: o[key]=v.
+      */
+
+
+#endif /* Py_ABSTRACTOBJECT_H */