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Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.

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This commit is contained in:
Robert Schuppenies 2008-06-01 16:16:17 +00:00
parent 6495c8da8f
commit 51df064767
9 changed files with 271 additions and 2 deletions
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41
Python/sysmodule.c
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@ -639,6 +639,45 @@ sys_mdebug(PyObject *self, PyObject *args)
}
#endif /* USE_MALLOPT */
static PyObject *
sys_getsizeof(PyObject *self, PyObject *args)
{
static PyObject * str__sizeof__ = NULL;
/* Initialize static variable needed by _PyType_Lookup */
if (str__sizeof__ == NULL) {
str__sizeof__ = PyString_InternFromString("__sizeof__");
if (str__sizeof__ == NULL)
return NULL;
}
/* Type objects */
if (PyType_Check(args)){
PyObject *method = _PyType_Lookup(Py_TYPE(args),
str__sizeof__);
if (method == NULL) {
PyErr_Format(PyExc_TypeError,
"Type %.100s doesn't define __sizeof__",
Py_TYPE(args)->tp_name);
return NULL;
}
return PyObject_CallFunctionObjArgs(method, args, NULL);
}
/* Instance of old-style classes */
else if(PyInstance_Check(args))
return PyInt_FromSsize_t(PyInstance_Type.tp_basicsize);
/* Old-style class */
else if (PyClass_Check(args))
return PyInt_FromSsize_t(PyClass_Type.tp_basicsize);
else
return PyObject_CallMethod(args, "__sizeof__", NULL);
}
PyDoc_STRVAR(getsizeof_doc,
"getsizeof(object) -> int\n\
\n\
Return the size of object in bytes.");
static PyObject *
sys_getrefcount(PyObject *self, PyObject *arg)
{
@ -850,6 +889,7 @@ static PyMethodDef sys_methods[] = {
{"getrefcount", (PyCFunction)sys_getrefcount, METH_O, getrefcount_doc},
{"getrecursionlimit", (PyCFunction)sys_getrecursionlimit, METH_NOARGS,
getrecursionlimit_doc},
{"getsizeof", sys_getsizeof, METH_O, getsizeof_doc},
{"_getframe", sys_getframe, METH_VARARGS, getframe_doc},
#ifdef MS_WINDOWS
{"getwindowsversion", (PyCFunction)sys_getwindowsversion, METH_NOARGS,
@ -1031,6 +1071,7 @@ getdlopenflags() -- returns flags to be used for dlopen() calls\n\
getprofile() -- get the global profiling function\n\
getrefcount() -- return the reference count for an object (plus one :-)\n\
getrecursionlimit() -- return the max recursion depth for the interpreter\n\
getsizeof() -- return the size of an object in bytes\n\
gettrace() -- get the global debug tracing function\n\
setcheckinterval() -- control how often the interpreter checks for events\n\
setdlopenflags() -- set the flags to be used for dlopen() calls\n\