cpython/Objects/moduleobject.c at 3.13 · python/cpython · GitHub

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/* Module object implementation */

#include "Python.h"

#include "pycore_call.h" // _PyObject_CallNoArgs()

#include "pycore_fileutils.h" // _Py_wgetcwd

#include "pycore_interp.h" // PyInterpreterState.importlib

#include "pycore_modsupport.h" // _PyModule_CreateInitialized()

#include "pycore_moduleobject.h" // _PyModule_GetDef()

#include "pycore_object.h" // _PyType_AllocNoTrack

#include "pycore_pyerrors.h" // _PyErr_FormatFromCause()

#include "pycore_pystate.h" // _PyInterpreterState_GET()

#include "pycore_sysmodule.h" // _PySys_GetOptionalAttrString()

#include "pycore_weakref.h" // FT_CLEAR_WEAKREFS()

#include "osdefs.h" // MAXPATHLEN

static PyMemberDef module_members[] = {

{"__dict__", _Py_T_OBJECT, offsetof(PyModuleObject, md_dict), Py_READONLY},

{0}

};

PyTypeObject PyModuleDef_Type = {

PyVarObject_HEAD_INIT(&PyType_Type, 0)

"moduledef", /* tp_name */

sizeof(PyModuleDef), /* tp_basicsize */

0, /* tp_itemsize */

};

int

_PyModule_IsExtension(PyObject *obj)

{

if (!PyModule_Check(obj)) {

return 0;

}

PyModuleObject *module = (PyModuleObject*)obj;

PyModuleDef *def = module->md_def;

return (def != NULL && def->m_methods != NULL);

}

PyObject*

PyModuleDef_Init(PyModuleDef* def)

{

assert(PyModuleDef_Type.tp_flags & Py_TPFLAGS_READY);

if (def->m_base.m_index == 0) {

Py_SET_REFCNT(def, 1);

Py_SET_TYPE(def, &PyModuleDef_Type);

def->m_base.m_index = _PyImport_GetNextModuleIndex();

}

return (PyObject*)def;

}

static int

module_init_dict(PyModuleObject *mod, PyObject *md_dict,

PyObject *name, PyObject *doc)

{

assert(md_dict != NULL);

if (doc == NULL)

doc = Py_None;

if (PyDict_SetItem(md_dict, &_Py_ID(__name__), name) != 0)

return -1;

if (PyDict_SetItem(md_dict, &_Py_ID(__doc__), doc) != 0)

return -1;

if (PyDict_SetItem(md_dict, &_Py_ID(__package__), Py_None) != 0)

return -1;

if (PyDict_SetItem(md_dict, &_Py_ID(__loader__), Py_None) != 0)

return -1;

if (PyDict_SetItem(md_dict, &_Py_ID(__spec__), Py_None) != 0)

return -1;

if (PyUnicode_CheckExact(name)) {

Py_XSETREF(mod->md_name, Py_NewRef(name));

}

return 0;

}

static PyModuleObject *

new_module_notrack(PyTypeObject *mt)

{

PyModuleObject *m;

m = (PyModuleObject *)_PyType_AllocNoTrack(mt, 0);

if (m == NULL)

return NULL;

m->md_def = NULL;

m->md_state = NULL;

m->md_weaklist = NULL;

m->md_name = NULL;

m->md_dict = PyDict_New();

if (m->md_dict == NULL) {

Py_DECREF(m);

return NULL;

}

return m;

}

static void

track_module(PyModuleObject *m)

{

_PyObject_SetDeferredRefcount(m->md_dict);

PyObject_GC_Track(m->md_dict);

_PyObject_SetDeferredRefcount((PyObject *)m);

PyObject_GC_Track(m);

}

static PyObject *

new_module(PyTypeObject *mt, PyObject *args, PyObject *kws)

{

PyModuleObject *m = new_module_notrack(mt);

if (m != NULL) {

track_module(m);

}

return (PyObject *)m;

}

PyObject *

PyModule_NewObject(PyObject *name)

{

PyModuleObject *m = new_module_notrack(&PyModule_Type);

if (m == NULL)

return NULL;

if (module_init_dict(m, m->md_dict, name, NULL) != 0)

goto fail;

track_module(m);

return (PyObject *)m;

fail:

Py_DECREF(m);

return NULL;

}

PyObject *

PyModule_New(const char *name)

{

PyObject *nameobj, *module;

nameobj = PyUnicode_FromString(name);

if (nameobj == NULL)

return NULL;

module = PyModule_NewObject(nameobj);

Py_DECREF(nameobj);

return module;

}

/* Check API/ABI version

* Issues a warning on mismatch, which is usually not fatal.

* Returns 0 if an exception is raised.

static int

check_api_version(const char *name, int module_api_version)

{

if (module_api_version != PYTHON_API_VERSION && module_api_version != PYTHON_ABI_VERSION) {

int err;

err = PyErr_WarnFormat(PyExc_RuntimeWarning, 1,

"Python C API version mismatch for module %.100s: "

"This Python has API version %d, module %.100s has version %d.",

name,

PYTHON_API_VERSION, name, module_api_version);

if (err)

return 0;

}

return 1;

}

static int

_add_methods_to_object(PyObject *module, PyObject *name, PyMethodDef *functions)

{

PyObject *func;

PyMethodDef *fdef;

for (fdef = functions; fdef->ml_name != NULL; fdef++) {

if ((fdef->ml_flags & METH_CLASS) ||

(fdef->ml_flags & METH_STATIC)) {

PyErr_SetString(PyExc_ValueError,

"module functions cannot set"

" METH_CLASS or METH_STATIC");

return -1;

}

func = PyCFunction_NewEx(fdef, (PyObject*)module, name);

if (func == NULL) {

return -1;

}

_PyObject_SetDeferredRefcount(func);

if (PyObject_SetAttrString(module, fdef->ml_name, func) != 0) {

Py_DECREF(func);

return -1;

}

Py_DECREF(func);

}

return 0;

}

PyObject *

PyModule_Create2(PyModuleDef* module, int module_api_version)

{

if (!_PyImport_IsInitialized(_PyInterpreterState_GET())) {

PyErr_SetString(PyExc_SystemError,

"Python import machinery not initialized");

return NULL;

}

return _PyModule_CreateInitialized(module, module_api_version);

}

PyObject *

_PyModule_CreateInitialized(PyModuleDef* module, int module_api_version)

{

const char* name;

PyModuleObject *m;

if (!PyModuleDef_Init(module))

return NULL;

name = module->m_name;

if (!check_api_version(name, module_api_version)) {

return NULL;

}

if (module->m_slots) {

PyErr_Format(

PyExc_SystemError,

"module %s: PyModule_Create is incompatible with m_slots", name);

return NULL;

}

name = _PyImport_ResolveNameWithPackageContext(name);

if ((m = (PyModuleObject*)PyModule_New(name)) == NULL)

return NULL;

if (module->m_size > 0) {

m->md_state = PyMem_Malloc(module->m_size);

if (!m->md_state) {

PyErr_NoMemory();

Py_DECREF(m);

return NULL;

}

memset(m->md_state, 0, module->m_size);

}

if (module->m_methods != NULL) {

if (PyModule_AddFunctions((PyObject *) m, module->m_methods) != 0) {

Py_DECREF(m);

return NULL;

}

if (module->m_doc != NULL) {

if (PyModule_SetDocString((PyObject *) m, module->m_doc) != 0) {

Py_DECREF(m);

return NULL;

}

m->md_def = module;

#ifdef Py_GIL_DISABLED

m->md_gil = Py_MOD_GIL_USED;

#endif

return (PyObject*)m;

}

PyObject *

PyModule_FromDefAndSpec2(PyModuleDef* def, PyObject *spec, int module_api_version)

{

PyModuleDef_Slot* cur_slot;

PyObject *(*create)(PyObject *, PyModuleDef*) = NULL;

PyObject *nameobj;

PyObject *m = NULL;

int has_multiple_interpreters_slot = 0;

void *multiple_interpreters = (void *)0;

int has_gil_slot = 0;

void *gil_slot = Py_MOD_GIL_USED;

int has_execution_slots = 0;

const char *name;

int ret;

PyInterpreterState *interp = _PyInterpreterState_GET();

PyModuleDef_Init(def);

nameobj = PyObject_GetAttrString(spec, "name");

if (nameobj == NULL) {

return NULL;

}

name = PyUnicode_AsUTF8(nameobj);

if (name == NULL) {

goto error;

}

if (!check_api_version(name, module_api_version)) {

goto error;

}

if (def->m_size < 0) {

PyErr_Format(

PyExc_SystemError,

"module %s: m_size may not be negative for multi-phase initialization",

name);

goto error;

}

for (cur_slot = def->m_slots; cur_slot && cur_slot->slot; cur_slot++) {

switch (cur_slot->slot) {

case Py_mod_create:

if (create) {

PyErr_Format(

PyExc_SystemError,

"module %s has multiple create slots",

name);

goto error;

}

create = cur_slot->value;

break;

case Py_mod_exec:

has_execution_slots = 1;

break;

case Py_mod_multiple_interpreters:

if (has_multiple_interpreters_slot) {

PyErr_Format(

PyExc_SystemError,

"module %s has more than one 'multiple interpreters' slots",

name);

goto error;

}

multiple_interpreters = cur_slot->value;

has_multiple_interpreters_slot = 1;

break;

case Py_mod_gil:

if (has_gil_slot) {

PyErr_Format(

PyExc_SystemError,

"module %s has more than one 'gil' slot",

name);

goto error;

}

gil_slot = cur_slot->value;

has_gil_slot = 1;

break;

default:

assert(cur_slot->slot < 0 || cur_slot->slot > _Py_mod_LAST_SLOT);

PyErr_Format(

PyExc_SystemError,

"module %s uses unknown slot ID %i",

name, cur_slot->slot);

goto error;

}

/* By default, multi-phase init modules are expected

to work under multiple interpreters. */

if (!has_multiple_interpreters_slot) {

multiple_interpreters = Py_MOD_MULTIPLE_INTERPRETERS_SUPPORTED;

}

if (multiple_interpreters == Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED) {

if (!_Py_IsMainInterpreter(interp)

&& _PyImport_CheckSubinterpIncompatibleExtensionAllowed(name) < 0)

{

goto error;

}

else if (multiple_interpreters != Py_MOD_PER_INTERPRETER_GIL_SUPPORTED

&& interp->ceval.own_gil

&& !_Py_IsMainInterpreter(interp)

&& _PyImport_CheckSubinterpIncompatibleExtensionAllowed(name) < 0)

{

goto error;

}

if (create) {

m = create(spec, def);

if (m == NULL) {

if (!PyErr_Occurred()) {

PyErr_Format(

PyExc_SystemError,

"creation of module %s failed without setting an exception",

name);

}

goto error;

} else {

if (PyErr_Occurred()) {

_PyErr_FormatFromCause(

PyExc_SystemError,

"creation of module %s raised unreported exception",

name);

goto error;

}

} else {

m = PyModule_NewObject(nameobj);

if (m == NULL) {

goto error;

}

if (PyModule_Check(m)) {

((PyModuleObject*)m)->md_state = NULL;

((PyModuleObject*)m)->md_def = def;

#ifdef Py_GIL_DISABLED

((PyModuleObject*)m)->md_gil = gil_slot;

#else

(void)gil_slot;

#endif

} else {

if (def->m_size > 0 || def->m_traverse || def->m_clear || def->m_free) {

PyErr_Format(

PyExc_SystemError,

"module %s is not a module object, but requests module state",

name);

goto error;

}

if (has_execution_slots) {

PyErr_Format(

PyExc_SystemError,

"module %s specifies execution slots, but did not create "

"a ModuleType instance",

name);

goto error;

}

if (def->m_methods != NULL) {

ret = _add_methods_to_object(m, nameobj, def->m_methods);

if (ret != 0) {

goto error;

}

if (def->m_doc != NULL) {

ret = PyModule_SetDocString(m, def->m_doc);

if (ret != 0) {

goto error;

}

Py_DECREF(nameobj);

return m;

error:

Py_DECREF(nameobj);

Py_XDECREF(m);

return NULL;

}

#ifdef Py_GIL_DISABLED

int

PyUnstable_Module_SetGIL(PyObject *module, void *gil)

{

if (!PyModule_Check(module)) {

PyErr_BadInternalCall();

return -1;

}

((PyModuleObject *)module)->md_gil = gil;

return 0;

}

#endif

int

PyModule_ExecDef(PyObject *module, PyModuleDef *def)

{

PyModuleDef_Slot *cur_slot;

const char *name;

int ret;

name = PyModule_GetName(module);

if (name == NULL) {

return -1;

}

if (def->m_size >= 0) {

PyModuleObject *md = (PyModuleObject*)module;

if (md->md_state == NULL) {

/* Always set a state pointer; this serves as a marker to skip

* multiple initialization (importlib.reload() is no-op) */

md->md_state = PyMem_Malloc(def->m_size);

if (!md->md_state) {

PyErr_NoMemory();

return -1;

}

memset(md->md_state, 0, def->m_size);

}

if (def->m_slots == NULL) {

return 0;

}

for (cur_slot = def->m_slots; cur_slot && cur_slot->slot; cur_slot++) {

switch (cur_slot->slot) {

case Py_mod_create:

/* handled in PyModule_FromDefAndSpec2 */

break;

case Py_mod_exec:

ret = ((int (*)(PyObject *))cur_slot->value)(module);

if (ret != 0) {

if (!PyErr_Occurred()) {

PyErr_Format(

PyExc_SystemError,

"execution of module %s failed without setting an exception",

name);

}

return -1;

}

if (PyErr_Occurred()) {

_PyErr_FormatFromCause(

PyExc_SystemError,

"execution of module %s raised unreported exception",

name);

return -1;

}

break;

case Py_mod_multiple_interpreters:

case Py_mod_gil:

/* handled in PyModule_FromDefAndSpec2 */

break;

default:

PyErr_Format(

PyExc_SystemError,

"module %s initialized with unknown slot %i",

name, cur_slot->slot);

return -1;

}

return 0;

}

int

PyModule_AddFunctions(PyObject *m, PyMethodDef *functions)

{

int res;

PyObject *name = PyModule_GetNameObject(m);

if (name == NULL) {

return -1;

}

res = _add_methods_to_object(m, name, functions);

Py_DECREF(name);

return res;

}

int

PyModule_SetDocString(PyObject *m, const char *doc)

{

PyObject *v;

v = PyUnicode_FromString(doc);

if (v == NULL || PyObject_SetAttr(m, &_Py_ID(__doc__), v) != 0) {

Py_XDECREF(v);

return -1;

}

Py_DECREF(v);

return 0;

}

PyObject *

PyModule_GetDict(PyObject *m)

{

if (!PyModule_Check(m)) {

PyErr_BadInternalCall();

return NULL;

}

return _PyModule_GetDict(m); // borrowed reference

}

PyObject*

PyModule_GetNameObject(PyObject *mod)

{

if (!PyModule_Check(mod)) {

PyErr_BadArgument();

return NULL;

}

PyObject *dict = ((PyModuleObject *)mod)->md_dict; // borrowed reference

if (dict == NULL || !PyDict_Check(dict)) {

goto error;

}

PyObject *name;

if (PyDict_GetItemRef(dict, &_Py_ID(__name__), &name) <= 0) {

// error or not found

goto error;

}

if (!PyUnicode_Check(name)) {

Py_DECREF(name);

goto error;

}

return name;

error:

if (!PyErr_Occurred()) {

PyErr_SetString(PyExc_SystemError, "nameless module");

}

return NULL;

}

const char *

PyModule_GetName(PyObject *m)

{

PyObject *name = PyModule_GetNameObject(m);

if (name == NULL) {

return NULL;

}

assert(Py_REFCNT(name) >= 2);

Py_DECREF(name); /* module dict has still a reference */

return PyUnicode_AsUTF8(name);

}

PyObject*

PyModule_GetFilenameObject(PyObject *mod)

{

if (!PyModule_Check(mod)) {

PyErr_BadArgument();

return NULL;

}

PyObject *dict = ((PyModuleObject *)mod)->md_dict; // borrowed reference

if (dict == NULL) {

goto error;

}

PyObject *fileobj;

if (PyDict_GetItemRef(dict, &_Py_ID(__file__), &fileobj) <= 0) {

// error or not found

goto error;

}

if (!PyUnicode_Check(fileobj)) {

Py_DECREF(fileobj);

goto error;

}

return fileobj;

error:

if (!PyErr_Occurred()) {

PyErr_SetString(PyExc_SystemError, "module filename missing");

}

return NULL;

}

const char *

PyModule_GetFilename(PyObject *m)

{

PyObject *fileobj;

const char *utf8;

fileobj = PyModule_GetFilenameObject(m);

if (fileobj == NULL)

return NULL;

utf8 = PyUnicode_AsUTF8(fileobj);

Py_DECREF(fileobj); /* module dict has still a reference */

return utf8;

}

PyModuleDef*

PyModule_GetDef(PyObject* m)

{

if (!PyModule_Check(m)) {

PyErr_BadArgument();

return NULL;

}

return _PyModule_GetDef(m);

}

void*

PyModule_GetState(PyObject* m)

{

if (!PyModule_Check(m)) {

PyErr_BadArgument();

return NULL;

}

return _PyModule_GetState(m);

}

void

_PyModule_Clear(PyObject *m)

{

PyObject *d = ((PyModuleObject *)m)->md_dict;

if (d != NULL)

_PyModule_ClearDict(d);

}

void

_PyModule_ClearDict(PyObject *d)

{

/* To make the execution order of destructors for global

objects a bit more predictable, we first zap all objects

whose name starts with a single underscore, before we clear

the entire dictionary. We zap them by replacing them with

None, rather than deleting them from the dictionary, to

avoid rehashing the dictionary (to some extent). */

Py_ssize_t pos;

PyObject *key, *value;

int verbose = _Py_GetConfig()->verbose;

/* First, clear only names starting with a single underscore */

pos = 0;

while (PyDict_Next(d, &pos, &key, &value)) {

if (value != Py_None && PyUnicode_Check(key)) {

if (PyUnicode_READ_CHAR(key, 0) == '_' &&

PyUnicode_READ_CHAR(key, 1) != '_') {

if (verbose > 1) {

const char *s = PyUnicode_AsUTF8(key);

if (s != NULL)

PySys_WriteStderr("# clear[1] %s\n", s);

else

PyErr_Clear();

}

if (PyDict_SetItem(d, key, Py_None) != 0) {

PyErr_FormatUnraisable("Exception ignored on clearing module dict");

}

/* Next, clear all names except for __builtins__ */

pos = 0;

while (PyDict_Next(d, &pos, &key, &value)) {

if (value != Py_None && PyUnicode_Check(key)) {

if (PyUnicode_READ_CHAR(key, 0) != '_' ||

!_PyUnicode_EqualToASCIIString(key, "__builtins__"))

{

if (verbose > 1) {

const char *s = PyUnicode_AsUTF8(key);

if (s != NULL)

PySys_WriteStderr("# clear[2] %s\n", s);

else

PyErr_Clear();

}

if (PyDict_SetItem(d, key, Py_None) != 0) {

PyErr_FormatUnraisable("Exception ignored on clearing module dict");

}

/* Note: we leave __builtins__ in place, so that destructors

of non-global objects defined in this module can still use

builtins, in particularly 'None'. */

}

/*[clinic input]

class module "PyModuleObject *" "&PyModule_Type"

[clinic start generated code]*/

/*[clinic end generated code: output=da39a3ee5e6b4b0d input=3e35d4f708ecb6af]*/

#include "clinic/moduleobject.c.h"

/* Methods */

/*[clinic input]

module.__init__

name: unicode

doc: object = None

Create a module object.

The name must be a string; the optional doc argument can have any type.

[clinic start generated code]*/

static int

module___init___impl(PyModuleObject *self, PyObject *name, PyObject *doc)

/*[clinic end generated code: output=e7e721c26ce7aad7 input=57f9e177401e5e1e]*/

{

return module_init_dict(self, self->md_dict, name, doc);

}

static void

module_dealloc(PyModuleObject *m)

{

int verbose = _Py_GetConfig()->verbose;

PyObject_GC_UnTrack(m);

if (verbose && m->md_name) {

PySys_FormatStderr("# destroy %U\n", m->md_name);

}

FT_CLEAR_WEAKREFS((PyObject *) m, m->md_weaklist);

/* bpo-39824: Don't call m_free() if m_size > 0 and md_state=NULL */

if (m->md_def && m->md_def->m_free

&& (m->md_def->m_size <= 0 || m->md_state != NULL))

{

m->md_def->m_free(m);

}

Py_XDECREF(m->md_dict);

Py_XDECREF(m->md_name);

if (m->md_state != NULL)

PyMem_Free(m->md_state);

Py_TYPE(m)->tp_free((PyObject *)m);

}

static PyObject *

module_repr(PyModuleObject *m)

{

PyInterpreterState *interp = _PyInterpreterState_GET();

return _PyImport_ImportlibModuleRepr(interp, (PyObject *)m);

}

/* Check if the "_initializing" attribute of the module spec is set to true.

int

_PyModuleSpec_IsInitializing(PyObject *spec)

{

if (spec == NULL) {

return 0;

}

PyObject *value;

int rc = PyObject_GetOptionalAttr(spec, &_Py_ID(_initializing), &value);

if (rc > 0) {

rc = PyObject_IsTrue(value);

Py_DECREF(value);

}

return rc;

}

/* Check if the submodule name is in the "_uninitialized_submodules" attribute

of the module spec.

int

_PyModuleSpec_IsUninitializedSubmodule(PyObject *spec, PyObject *name)

{

if (spec == NULL) {

return 0;

}

PyObject *value;

int rc = PyObject_GetOptionalAttr(spec, &_Py_ID(_uninitialized_submodules), &value);

if (rc > 0) {

rc = PySequence_Contains(value, name);

Py_DECREF(value);

}

return rc;

}

int

_PyModuleSpec_GetFileOrigin(PyObject *spec, PyObject **p_origin)

{

PyObject *has_location = NULL;

int rc = PyObject_GetOptionalAttr(spec, &_Py_ID(has_location), &has_location);

if (rc <= 0) {

return rc;

}

// If origin is not a location, or doesn't exist, or is not a str, we could consider falling

// back to module.__file__. But the cases in which module.__file__ is not __spec__.origin

// are cases in which we probably shouldn't be guessing.

rc = PyObject_IsTrue(has_location);

Py_DECREF(has_location);

if (rc <= 0) {

return rc;

}

// has_location is true, so origin is a location

PyObject *origin = NULL;

rc = PyObject_GetOptionalAttr(spec, &_Py_ID(origin), &origin);

if (rc <= 0) {

return rc;

}

assert(origin != NULL);

if (!PyUnicode_Check(origin)) {

Py_DECREF(origin);

return 0;

}

*p_origin = origin;

return 1;

}

int

_PyModule_IsPossiblyShadowing(PyObject *origin)

{

// origin must be a unicode subtype

// Returns 1 if the module at origin could be shadowing a module of the

// same name later in the module search path. The condition we check is basically:

// root = os.path.dirname(origin.removesuffix(os.sep + "__init__.py"))

// return not sys.flags.safe_path and root == (sys.path[0] or os.getcwd())

// Returns 0 otherwise (or if we aren't sure)

// Returns -1 if an error occurred that should be propagated

if (origin == NULL) {

return 0;

}

// not sys.flags.safe_path

const PyConfig *config = _Py_GetConfig();

if (config->safe_path) {

return 0;

}

// root = os.path.dirname(origin.removesuffix(os.sep + "__init__.py"))

wchar_t root[MAXPATHLEN + 1];

Py_ssize_t size = PyUnicode_AsWideChar(origin, root, MAXPATHLEN);

if (size < 0) {

return -1;

}

assert(size <= MAXPATHLEN);

root[size] = L'\0';

wchar_t *sep = wcsrchr(root, SEP);

if (sep == NULL) {

return 0;

}

// If it's a package then we need to look one directory further up

if (wcscmp(sep + 1, L"__init__.py") == 0) {

*sep = L'\0';

sep = wcsrchr(root, SEP);

if (sep == NULL) {

return 0;

}

*sep = L'\0';

// sys.path[0] or os.getcwd()

wchar_t *sys_path_0 = config->sys_path_0;

if (!sys_path_0) {

return 0;

}

wchar_t sys_path_0_buf[MAXPATHLEN];

if (sys_path_0[0] == L'\0') {

// if sys.path[0] == "", treat it as if it were the current directory

if (!_Py_wgetcwd(sys_path_0_buf, MAXPATHLEN)) {

// If we failed to getcwd, don't raise an exception and instead

// let the caller proceed assuming no shadowing

return 0;

}

sys_path_0 = sys_path_0_buf;

}

int result = wcscmp(sys_path_0, root) == 0;

return result;

}

PyObject*

_Py_module_getattro_impl(PyModuleObject *m, PyObject *name, int suppress)

{

// When suppress=1, this function suppresses AttributeError.

PyObject *attr, *mod_name, *getattr;

attr = _PyObject_GenericGetAttrWithDict((PyObject *)m, name, NULL, suppress);

if (attr) {

return attr;

}

if (suppress == 1) {

if (PyErr_Occurred()) {

// pass up non-AttributeError exception

return NULL;

}

else {

if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {

// pass up non-AttributeError exception

return NULL;

}

PyErr_Clear();

}

assert(m->md_dict != NULL);

if (PyDict_GetItemRef(m->md_dict, &_Py_ID(__getattr__), &getattr) < 0) {

return NULL;

}

if (getattr) {

PyObject *result = PyObject_CallOneArg(getattr, name);

if (result == NULL && suppress == 1 && PyErr_ExceptionMatches(PyExc_AttributeError)) {

// suppress AttributeError

PyErr_Clear();

}

Py_DECREF(getattr);

return result;

}

// The attribute was not found. We make a best effort attempt at a useful error message,

// but only if we're not suppressing AttributeError.

if (suppress == 1) {

return NULL;

}

if (PyDict_GetItemRef(m->md_dict, &_Py_ID(__name__), &mod_name) < 0) {

return NULL;

}

if (!mod_name || !PyUnicode_Check(mod_name)) {

Py_XDECREF(mod_name);

PyErr_Format(PyExc_AttributeError,

"module has no attribute '%U'", name);

return NULL;

}

PyObject *spec;

if (PyDict_GetItemRef(m->md_dict, &_Py_ID(__spec__), &spec) < 0) {

Py_DECREF(mod_name);

return NULL;

}

if (spec == NULL) {

PyErr_Format(PyExc_AttributeError,

"module '%U' has no attribute '%U'",

mod_name, name);

Py_DECREF(mod_name);

return NULL;

}

PyObject *origin = NULL;

if (_PyModuleSpec_GetFileOrigin(spec, &origin) < 0) {

goto done;

}

int is_possibly_shadowing = _PyModule_IsPossiblyShadowing(origin);

if (is_possibly_shadowing < 0) {

goto done;

}

int is_possibly_shadowing_stdlib = 0;

if (is_possibly_shadowing) {

PyObject *stdlib_modules;

if (_PySys_GetOptionalAttrString("stdlib_module_names", &stdlib_modules) < 0) {

goto done;

}

if (stdlib_modules && PyAnySet_Check(stdlib_modules)) {

View remainder of file in raw view

cpython/Objects/moduleobject.c at 3.13 · python/cpython · GitHub

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cpython/Objects/moduleobject.c at 3.13 · python/cpython · GitHub

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