| #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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((PyObject *o)); |
| |
| /* |
| Returns 1 if the object, o, provides numeric protocols, and |
| false otherwise. |
| |
| This function always succeeds. |
| |
| */ |
| |
| PyObject *PyNumber_Add Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((PyObject *o)); |
| |
| /* |
| Return 1 if the object provides sequence protocol, and zero |
| otherwise. |
| |
| This function always succeeds. |
| |
| */ |
| |
| int PySequence_Length Py_PROTO((PyObject *o)); |
| |
| /* |
| Return the length of sequence object o, or -1 on failure. |
| |
| */ |
| |
| PyObject *PySequence_Concat Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((PyObject *o)); |
| |
| /* |
| Return 1 if the object provides mapping protocol, and zero |
| otherwise. |
| |
| This function always succeeds. |
| */ |
| |
| int PyMapping_Length Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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 Py_PROTO((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. |
| */ |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif /* Py_ABSTRACTOBJECT_H */ |