Issue #25791: Raise an ImportWarning when __spec__ or __package__ are

not defined for a relative import.

This is the start of work to try and clean up import semantics to rely
more on a module's spec than on the myriad attributes that get set on
a module. Thanks to Rose Ames for the patch.

2 files changed, 329 insertions, 294 deletions

diff --git a/Python/import.c b/Python/import.c
index 325b936..c1071c0 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -1359,6 +1359,7 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *given_globals,
     PyObject *final_mod = NULL;
     PyObject *mod = NULL;
     PyObject *package = NULL;
+    PyObject *spec = NULL;
     PyObject *globals = NULL;
     PyObject *fromlist = NULL;
     PyInterpreterState *interp = PyThreadState_GET()->interp;
@@ -1414,39 +1415,60 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *given_globals,
         goto error;
     }
     else if (level > 0) {
-        package = _PyDict_GetItemId(globals, &PyId___package__);
+        spec = _PyDict_GetItemId(globals, &PyId___spec__);
+        if (spec != NULL) {
+            package = PyObject_GetAttrString(spec, "parent");
+        }
         if (package != NULL && package != Py_None) {
-            Py_INCREF(package);
             if (!PyUnicode_Check(package)) {
-                PyErr_SetString(PyExc_TypeError, "package must be a string");
+                PyErr_SetString(PyExc_TypeError,
+                        "__spec__.parent must be a string");
                 goto error;
             }
         }
         else {
-            package = _PyDict_GetItemId(globals, &PyId___name__);
-            if (package == NULL) {
-                PyErr_SetString(PyExc_KeyError, "'__name__' not in globals");
-                goto error;
-            }
-            else if (!PyUnicode_Check(package)) {
-                PyErr_SetString(PyExc_TypeError, "__name__ must be a string");
+            package = _PyDict_GetItemId(globals, &PyId___package__);
+            if (package != NULL && package != Py_None) {
+                Py_INCREF(package);
+                if (!PyUnicode_Check(package)) {
+                    PyErr_SetString(PyExc_TypeError, "package must be a string");
+                    goto error;
+                }
             }
-            Py_INCREF(package);
-
-            if (_PyDict_GetItemId(globals, &PyId___path__) == NULL) {
-                PyObject *partition = NULL;
-                PyObject *borrowed_dot = _PyUnicode_FromId(&single_dot);
-                if (borrowed_dot == NULL) {
+            else {
+                if (PyErr_WarnEx(PyExc_ImportWarning,
+                            "can't resolve package from __spec__ or __package__, "
+                            "falling back on __name__ and __path__", 1) < 0) {
                     goto error;
                 }
-                partition = PyUnicode_RPartition(package, borrowed_dot);
-                Py_DECREF(package);
-                if (partition == NULL) {
+
+                package = _PyDict_GetItemId(globals, &PyId___name__);
+                if (package == NULL) {
+                    PyErr_SetString(PyExc_KeyError, "'__name__' not in globals");
                     goto error;
                 }
-                package = PyTuple_GET_ITEM(partition, 0);
+
                 Py_INCREF(package);
-                Py_DECREF(partition);
+                if (!PyUnicode_Check(package)) {
+                    PyErr_SetString(PyExc_TypeError, "__name__ must be a string");
+                    goto error;
+                }
+
+                if (_PyDict_GetItemId(globals, &PyId___path__) == NULL) {
+                    PyObject *partition = NULL;
+                    PyObject *borrowed_dot = _PyUnicode_FromId(&single_dot);
+                    if (borrowed_dot == NULL) {
+                        goto error;
+                    }
+                    partition = PyUnicode_RPartition(package, borrowed_dot);
+                    Py_DECREF(package);
+                    if (partition == NULL) {
+                        goto error;
+                    }
+                    package = PyTuple_GET_ITEM(partition, 0);
+                    Py_INCREF(package);
+                    Py_DECREF(partition);
+                }
             }
         }
 
diff --git a/Python/importlib.h b/Python/importlib.h
index a4daf62..709c5fd 100644
--- a/Python/importlib.h
+++ b/Python/importlib.h
@@ -1057,7 +1057,7 @@ const unsigned char _Py_M__importlib[] = {
     100,101,114,115,32,100,101,102,105,110,105,110,103,32,101,120,
     101,99,95,109,111,100,117,108,101,40,41,32,109,117,115,116,
     32,97,108,115,111,32,100,101,102,105,110,101,32,99,114,101,
-    97,116,101,95,109,111,100,117,108,101,40,41,90,10,115,116,
+    97,116,101,95,109,111,100,117,108,101,40,41,218,10,115,116,
     97,99,107,108,101,118,101,108,233,2,0,0,0,41,9,114,
     4,0,0,0,114,99,0,0,0,114,138,0,0,0,218,9,
     95,119,97,114,110,105,110,103,115,218,4,119,97,114,110,218,
@@ -1067,7 +1067,7 @@ const unsigned char _Py_M__importlib[] = {
     0,0,0,114,10,0,0,0,114,11,0,0,0,218,16,109,
     111,100,117,108,101,95,102,114,111,109,95,115,112,101,99,58,
     2,0,0,115,20,0,0,0,0,3,6,1,18,3,21,1,
-    18,1,9,2,13,1,12,1,15,1,13,1,114,144,0,0,
+    18,1,9,2,13,1,12,1,15,1,13,1,114,145,0,0,
     0,99,1,0,0,0,0,0,0,0,2,0,0,0,3,0,
     0,0,67,0,0,0,115,149,0,0,0,124,0,0,106,0,
     0,100,1,0,107,8,0,114,21,0,100,2,0,110,6,0,
@@ -1149,7 +1149,7 @@ const unsigned char _Py_M__importlib[] = {
     0,1,1,1,89,110,1,0,88,124,1,0,83,41,7,78,
     114,91,0,0,0,114,134,0,0,0,114,131,0,0,0,114,
     121,0,0,0,114,33,0,0,0,114,95,0,0,0,41,13,
-    114,99,0,0,0,114,146,0,0,0,114,15,0,0,0,114,
+    114,99,0,0,0,114,147,0,0,0,114,15,0,0,0,114,
     14,0,0,0,114,21,0,0,0,114,6,0,0,0,114,91,
     0,0,0,114,96,0,0,0,114,1,0,0,0,114,134,0,
     0,0,114,4,0,0,0,114,122,0,0,0,114,95,0,0,
@@ -1159,7 +1159,7 @@ const unsigned char _Py_M__importlib[] = {
     112,97,116,105,98,108,101,118,2,0,0,115,40,0,0,0,
     0,4,19,2,16,1,24,1,3,1,16,1,13,1,5,1,
     24,1,3,4,12,1,15,1,29,1,13,1,5,1,24,1,
-    3,1,13,1,13,1,5,1,114,148,0,0,0,99,1,0,
+    3,1,13,1,13,1,5,1,114,149,0,0,0,99,1,0,
     0,0,0,0,0,0,2,0,0,0,11,0,0,0,67,0,
     0,0,115,159,0,0,0,124,0,0,106,0,0,100,0,0,
     107,9,0,114,43,0,116,1,0,124,0,0,106,0,0,100,
@@ -1174,14 +1174,14 @@ const unsigned char _Py_M__importlib[] = {
     0,106,7,0,25,83,41,4,78,114,139,0,0,0,122,14,
     109,105,115,115,105,110,103,32,108,111,97,100,101,114,114,15,
     0,0,0,41,11,114,99,0,0,0,114,4,0,0,0,114,
-    148,0,0,0,114,144,0,0,0,114,102,0,0,0,114,110,
+    149,0,0,0,114,145,0,0,0,114,102,0,0,0,114,110,
     0,0,0,114,77,0,0,0,114,15,0,0,0,114,139,0,
     0,0,114,14,0,0,0,114,21,0,0,0,41,2,114,88,
     0,0,0,114,89,0,0,0,114,10,0,0,0,114,10,0,
     0,0,114,11,0,0,0,218,14,95,108,111,97,100,95,117,
     110,108,111,99,107,101,100,147,2,0,0,115,20,0,0,0,
     0,2,15,2,18,1,10,2,12,1,13,1,15,1,15,1,
-    24,3,23,5,114,149,0,0,0,99,1,0,0,0,0,0,
+    24,3,23,5,114,150,0,0,0,99,1,0,0,0,0,0,
     0,0,1,0,0,0,9,0,0,0,67,0,0,0,115,47,
     0,0,0,116,0,0,106,1,0,131,0,0,1,116,2,0,
     124,0,0,106,3,0,131,1,0,143,15,0,1,116,4,0,
@@ -1198,8 +1198,8 @@ const unsigned char _Py_M__importlib[] = {
     100,117,108,101,115,44,32,116,104,97,116,32,101,120,105,115,
     116,105,110,103,32,109,111,100,117,108,101,32,103,101,116,115,
     10,32,32,32,32,99,108,111,98,98,101,114,101,100,46,10,
-    10,32,32,32,32,78,41,5,114,57,0,0,0,114,145,0,
-    0,0,114,54,0,0,0,114,15,0,0,0,114,149,0,0,
+    10,32,32,32,32,78,41,5,114,57,0,0,0,114,146,0,
+    0,0,114,54,0,0,0,114,15,0,0,0,114,150,0,0,
     0,41,1,114,88,0,0,0,114,10,0,0,0,114,10,0,
     0,0,114,11,0,0,0,114,87,0,0,0,170,2,0,0,
     115,6,0,0,0,0,9,10,1,16,1,114,87,0,0,0,
@@ -1274,8 +1274,8 @@ const unsigned char _Py_M__importlib[] = {
     112,114,101,99,97,116,101,100,46,32,32,85,115,101,32,102,
     105,110,100,95,115,112,101,99,40,41,32,105,110,115,116,101,
     97,100,46,10,10,32,32,32,32,32,32,32,32,78,41,2,
-    114,154,0,0,0,114,99,0,0,0,41,4,114,151,0,0,
-    0,114,78,0,0,0,114,152,0,0,0,114,88,0,0,0,
+    114,155,0,0,0,114,99,0,0,0,41,4,114,152,0,0,
+    0,114,78,0,0,0,114,153,0,0,0,114,88,0,0,0,
     114,10,0,0,0,114,10,0,0,0,114,11,0,0,0,218,
     11,102,105,110,100,95,109,111,100,117,108,101,213,2,0,0,
     115,4,0,0,0,0,9,18,1,122,27,66,117,105,108,116,
@@ -1315,7 +1315,7 @@ const unsigned char _Py_M__importlib[] = {
     32,97,115,32,98,117,105,108,116,45,105,110,32,109,111,100,
     117,108,101,115,32,100,111,32,110,111,116,32,104,97,118,101,
     32,99,111,100,101,32,111,98,106,101,99,116,115,46,78,114,
-    10,0,0,0,41,2,114,151,0,0,0,114,78,0,0,0,
+    10,0,0,0,41,2,114,152,0,0,0,114,78,0,0,0,
     114,10,0,0,0,114,10,0,0,0,114,11,0,0,0,218,
     8,103,101,116,95,99,111,100,101,238,2,0,0,115,2,0,
     0,0,0,4,122,24,66,117,105,108,116,105,110,73,109,112,
@@ -1326,7 +1326,7 @@ const unsigned char _Py_M__importlib[] = {
     117,105,108,116,45,105,110,32,109,111,100,117,108,101,115,32,
     100,111,32,110,111,116,32,104,97,118,101,32,115,111,117,114,
     99,101,32,99,111,100,101,46,78,114,10,0,0,0,41,2,
-    114,151,0,0,0,114,78,0,0,0,114,10,0,0,0,114,
+    114,152,0,0,0,114,78,0,0,0,114,10,0,0,0,114,
     10,0,0,0,114,11,0,0,0,218,10,103,101,116,95,115,
     111,117,114,99,101,244,2,0,0,115,2,0,0,0,0,4,
     122,26,66,117,105,108,116,105,110,73,109,112,111,114,116,101,
@@ -1336,7 +1336,7 @@ const unsigned char _Py_M__importlib[] = {
     116,117,114,110,32,70,97,108,115,101,32,97,115,32,98,117,
     105,108,116,45,105,110,32,109,111,100,117,108,101,115,32,97,
     114,101,32,110,101,118,101,114,32,112,97,99,107,97,103,101,
-    115,46,70,114,10,0,0,0,41,2,114,151,0,0,0,114,
+    115,46,70,114,10,0,0,0,41,2,114,152,0,0,0,114,
     78,0,0,0,114,10,0,0,0,114,10,0,0,0,114,11,
     0,0,0,114,109,0,0,0,250,2,0,0,115,2,0,0,
     0,0,4,122,26,66,117,105,108,116,105,110,73,109,112,111,
@@ -1344,14 +1344,14 @@ const unsigned char _Py_M__importlib[] = {
     17,114,1,0,0,0,114,0,0,0,0,114,2,0,0,0,
     114,3,0,0,0,218,12,115,116,97,116,105,99,109,101,116,
     104,111,100,114,92,0,0,0,218,11,99,108,97,115,115,109,
-    101,116,104,111,100,114,154,0,0,0,114,155,0,0,0,114,
-    138,0,0,0,114,139,0,0,0,114,81,0,0,0,114,156,
-    0,0,0,114,157,0,0,0,114,109,0,0,0,114,90,0,
-    0,0,114,146,0,0,0,114,10,0,0,0,114,10,0,0,
-    0,114,10,0,0,0,114,11,0,0,0,114,150,0,0,0,
+    101,116,104,111,100,114,155,0,0,0,114,156,0,0,0,114,
+    138,0,0,0,114,139,0,0,0,114,81,0,0,0,114,157,
+    0,0,0,114,158,0,0,0,114,109,0,0,0,114,90,0,
+    0,0,114,147,0,0,0,114,10,0,0,0,114,10,0,0,
+    0,114,10,0,0,0,114,11,0,0,0,114,151,0,0,0,
     186,2,0,0,115,30,0,0,0,12,7,6,2,18,9,3,
     1,21,8,3,1,18,11,18,8,18,5,3,1,21,5,3,
-    1,21,5,3,1,21,5,114,150,0,0,0,99,0,0,0,
+    1,21,5,3,1,21,5,114,151,0,0,0,99,0,0,0,
     0,0,0,0,0,0,0,0,0,5,0,0,0,64,0,0,
     0,115,211,0,0,0,101,0,0,90,1,0,100,0,0,90,
     2,0,100,1,0,90,3,0,101,4,0,100,2,0,100,3,
@@ -1399,9 +1399,9 @@ const unsigned char _Py_M__importlib[] = {
     124,0,0,100,1,0,100,2,0,131,2,1,83,100,0,0,
     83,100,0,0,83,41,3,78,114,107,0,0,0,90,6,102,
     114,111,122,101,110,41,3,114,57,0,0,0,114,82,0,0,
-    0,114,85,0,0,0,41,4,114,151,0,0,0,114,78,0,
-    0,0,114,152,0,0,0,114,153,0,0,0,114,10,0,0,
-    0,114,10,0,0,0,114,11,0,0,0,114,154,0,0,0,
+    0,114,85,0,0,0,41,4,114,152,0,0,0,114,78,0,
+    0,0,114,153,0,0,0,114,154,0,0,0,114,10,0,0,
+    0,114,10,0,0,0,114,11,0,0,0,114,155,0,0,0,
     21,3,0,0,115,6,0,0,0,0,2,15,1,19,2,122,
     24,70,114,111,122,101,110,73,109,112,111,114,116,101,114,46,
     102,105,110,100,95,115,112,101,99,99,3,0,0,0,0,0,
@@ -1414,9 +1414,9 @@ const unsigned char _Py_M__importlib[] = {
     101,99,97,116,101,100,46,32,32,85,115,101,32,102,105,110,
     100,95,115,112,101,99,40,41,32,105,110,115,116,101,97,100,
     46,10,10,32,32,32,32,32,32,32,32,78,41,2,114,57,
-    0,0,0,114,82,0,0,0,41,3,114,151,0,0,0,114,
-    78,0,0,0,114,152,0,0,0,114,10,0,0,0,114,10,
-    0,0,0,114,11,0,0,0,114,155,0,0,0,28,3,0,
+    0,0,0,114,82,0,0,0,41,3,114,152,0,0,0,114,
+    78,0,0,0,114,153,0,0,0,114,10,0,0,0,114,10,
+    0,0,0,114,11,0,0,0,114,156,0,0,0,28,3,0,
     0,115,2,0,0,0,0,7,122,26,70,114,111,122,101,110,
     73,109,112,111,114,116,101,114,46,102,105,110,100,95,109,111,
     100,117,108,101,99,2,0,0,0,0,0,0,0,2,0,0,
@@ -1424,7 +1424,7 @@ const unsigned char _Py_M__importlib[] = {
     0,83,41,2,122,42,85,115,101,32,100,101,102,97,117,108,
     116,32,115,101,109,97,110,116,105,99,115,32,102,111,114,32,
     109,111,100,117,108,101,32,99,114,101,97,116,105,111,110,46,
-    78,114,10,0,0,0,41,2,114,151,0,0,0,114,88,0,
+    78,114,10,0,0,0,41,2,114,152,0,0,0,114,88,0,
     0,0,114,10,0,0,0,114,10,0,0,0,114,11,0,0,
     0,114,138,0,0,0,37,3,0,0,115,0,0,0,0,122,
     28,70,114,111,122,101,110,73,109,112,111,114,116,101,114,46,
@@ -1457,8 +1457,8 @@ const unsigned char _Py_M__importlib[] = {
     99,97,116,101,100,46,32,32,85,115,101,32,101,120,101,99,
     95,109,111,100,117,108,101,40,41,32,105,110,115,116,101,97,
     100,46,10,10,32,32,32,32,32,32,32,32,41,1,114,90,
-    0,0,0,41,2,114,151,0,0,0,114,78,0,0,0,114,
-    10,0,0,0,114,10,0,0,0,114,11,0,0,0,114,146,
+    0,0,0,41,2,114,152,0,0,0,114,78,0,0,0,114,
+    10,0,0,0,114,10,0,0,0,114,11,0,0,0,114,147,
     0,0,0,50,3,0,0,115,2,0,0,0,0,7,122,26,
     70,114,111,122,101,110,73,109,112,111,114,116,101,114,46,108,
     111,97,100,95,109,111,100,117,108,101,99,2,0,0,0,0,
@@ -1467,9 +1467,9 @@ const unsigned char _Py_M__importlib[] = {
     83,41,1,122,45,82,101,116,117,114,110,32,116,104,101,32,
     99,111,100,101,32,111,98,106,101,99,116,32,102,111,114,32,
     116,104,101,32,102,114,111,122,101,110,32,109,111,100,117,108,
-    101,46,41,2,114,57,0,0,0,114,162,0,0,0,41,2,
-    114,151,0,0,0,114,78,0,0,0,114,10,0,0,0,114,
-    10,0,0,0,114,11,0,0,0,114,156,0,0,0,59,3,
+    101,46,41,2,114,57,0,0,0,114,163,0,0,0,41,2,
+    114,152,0,0,0,114,78,0,0,0,114,10,0,0,0,114,
+    10,0,0,0,114,11,0,0,0,114,157,0,0,0,59,3,
     0,0,115,2,0,0,0,0,4,122,23,70,114,111,122,101,
     110,73,109,112,111,114,116,101,114,46,103,101,116,95,99,111,
     100,101,99,2,0,0,0,0,0,0,0,2,0,0,0,1,
@@ -1478,8 +1478,8 @@ const unsigned char _Py_M__importlib[] = {
     97,115,32,102,114,111,122,101,110,32,109,111,100,117,108,101,
     115,32,100,111,32,110,111,116,32,104,97,118,101,32,115,111,
     117,114,99,101,32,99,111,100,101,46,78,114,10,0,0,0,
-    41,2,114,151,0,0,0,114,78,0,0,0,114,10,0,0,
-    0,114,10,0,0,0,114,11,0,0,0,114,157,0,0,0,
+    41,2,114,152,0,0,0,114,78,0,0,0,114,10,0,0,
+    0,114,10,0,0,0,114,11,0,0,0,114,158,0,0,0,
     65,3,0,0,115,2,0,0,0,0,4,122,25,70,114,111,
     122,101,110,73,109,112,111,114,116,101,114,46,103,101,116,95,
     115,111,117,114,99,101,99,2,0,0,0,0,0,0,0,2,
@@ -1489,21 +1489,21 @@ const unsigned char _Py_M__importlib[] = {
     116,104,101,32,102,114,111,122,101,110,32,109,111,100,117,108,
     101,32,105,115,32,97,32,112,97,99,107,97,103,101,46,41,
     2,114,57,0,0,0,90,17,105,115,95,102,114,111,122,101,
-    110,95,112,97,99,107,97,103,101,41,2,114,151,0,0,0,
+    110,95,112,97,99,107,97,103,101,41,2,114,152,0,0,0,
     114,78,0,0,0,114,10,0,0,0,114,10,0,0,0,114,
     11,0,0,0,114,109,0,0,0,71,3,0,0,115,2,0,
     0,0,0,4,122,25,70,114,111,122,101,110,73,109,112,111,
     114,116,101,114,46,105,115,95,112,97,99,107,97,103,101,41,
     16,114,1,0,0,0,114,0,0,0,0,114,2,0,0,0,
-    114,3,0,0,0,114,158,0,0,0,114,92,0,0,0,114,
-    159,0,0,0,114,154,0,0,0,114,155,0,0,0,114,138,
-    0,0,0,114,139,0,0,0,114,146,0,0,0,114,84,0,
-    0,0,114,156,0,0,0,114,157,0,0,0,114,109,0,0,
+    114,3,0,0,0,114,159,0,0,0,114,92,0,0,0,114,
+    160,0,0,0,114,155,0,0,0,114,156,0,0,0,114,138,
+    0,0,0,114,139,0,0,0,114,147,0,0,0,114,84,0,
+    0,0,114,157,0,0,0,114,158,0,0,0,114,109,0,0,
     0,114,10,0,0,0,114,10,0,0,0,114,10,0,0,0,
-    114,11,0,0,0,114,160,0,0,0,3,3,0,0,115,30,
+    114,11,0,0,0,114,161,0,0,0,3,3,0,0,115,30,
     0,0,0,12,7,6,2,18,9,3,1,21,6,3,1,18,
     8,18,4,18,9,18,9,3,1,21,5,3,1,21,5,3,
-    1,114,160,0,0,0,99,0,0,0,0,0,0,0,0,0,
+    1,114,161,0,0,0,99,0,0,0,0,0,0,0,0,0,
     0,0,0,2,0,0,0,64,0,0,0,115,46,0,0,0,
     101,0,0,90,1,0,100,0,0,90,2,0,100,1,0,90,
     3,0,100,2,0,100,3,0,132,0,0,90,4,0,100,4,
@@ -1516,7 +1516,7 @@ const unsigned char _Py_M__importlib[] = {
     14,0,0,0,116,0,0,106,1,0,131,0,0,1,100,1,
     0,83,41,2,122,24,65,99,113,117,105,114,101,32,116,104,
     101,32,105,109,112,111,114,116,32,108,111,99,107,46,78,41,
-    2,114,57,0,0,0,114,145,0,0,0,41,1,114,19,0,
+    2,114,57,0,0,0,114,146,0,0,0,41,1,114,19,0,
     0,0,114,10,0,0,0,114,10,0,0,0,114,11,0,0,
     0,114,23,0,0,0,84,3,0,0,115,2,0,0,0,0,
     2,122,28,95,73,109,112,111,114,116,76,111,99,107,67,111,
@@ -1538,8 +1538,8 @@ const unsigned char _Py_M__importlib[] = {
     0,0,0,114,0,0,0,0,114,2,0,0,0,114,3,0,
     0,0,114,23,0,0,0,114,30,0,0,0,114,10,0,0,
     0,114,10,0,0,0,114,10,0,0,0,114,11,0,0,0,
-    114,165,0,0,0,80,3,0,0,115,6,0,0,0,12,2,
-    6,2,12,4,114,165,0,0,0,99,3,0,0,0,0,0,
+    114,166,0,0,0,80,3,0,0,115,6,0,0,0,12,2,
+    6,2,12,4,114,166,0,0,0,99,3,0,0,0,0,0,
     0,0,5,0,0,0,4,0,0,0,67,0,0,0,115,88,
     0,0,0,124,1,0,106,0,0,100,1,0,124,2,0,100,
     2,0,24,131,2,0,125,3,0,116,1,0,124,3,0,131,
@@ -1562,17 +1562,17 @@ const unsigned char _Py_M__importlib[] = {
     0,0,0,114,10,0,0,0,114,11,0,0,0,218,13,95,
     114,101,115,111,108,118,101,95,110,97,109,101,93,3,0,0,
     115,10,0,0,0,0,2,22,1,18,1,12,1,10,1,114,
-    171,0,0,0,99,3,0,0,0,0,0,0,0,4,0,0,
+    172,0,0,0,99,3,0,0,0,0,0,0,0,4,0,0,
     0,3,0,0,0,67,0,0,0,115,47,0,0,0,124,0,
     0,106,0,0,124,1,0,124,2,0,131,2,0,125,3,0,
     124,3,0,100,0,0,107,8,0,114,34,0,100,0,0,83,
     116,1,0,124,1,0,124,3,0,131,2,0,83,41,1,78,
-    41,2,114,155,0,0,0,114,85,0,0,0,41,4,218,6,
-    102,105,110,100,101,114,114,15,0,0,0,114,152,0,0,0,
+    41,2,114,156,0,0,0,114,85,0,0,0,41,4,218,6,
+    102,105,110,100,101,114,114,15,0,0,0,114,153,0,0,0,
     114,99,0,0,0,114,10,0,0,0,114,10,0,0,0,114,
     11,0,0,0,218,17,95,102,105,110,100,95,115,112,101,99,
     95,108,101,103,97,99,121,102,3,0,0,115,8,0,0,0,
-    0,3,18,1,12,1,4,1,114,173,0,0,0,99,3,0,
+    0,3,18,1,12,1,4,1,114,174,0,0,0,99,3,0,
     0,0,0,0,0,0,9,0,0,0,27,0,0,0,67,0,
     0,0,115,42,1,0,0,116,0,0,106,1,0,100,1,0,
     107,9,0,114,41,0,116,0,0,106,1,0,12,114,41,0,
@@ -1597,19 +1597,19 @@ const unsigned char _Py_M__importlib[] = {
     108,101,39,115,32,108,111,97,100,101,114,46,78,122,22,115,
     121,115,46,109,101,116,97,95,112,97,116,104,32,105,115,32,
     101,109,112,116,121,41,11,114,14,0,0,0,218,9,109,101,
-    116,97,95,112,97,116,104,114,141,0,0,0,114,142,0,0,
+    116,97,95,112,97,116,104,114,142,0,0,0,114,143,0,0,
     0,218,13,73,109,112,111,114,116,87,97,114,110,105,110,103,
-    114,21,0,0,0,114,165,0,0,0,114,154,0,0,0,114,
-    96,0,0,0,114,173,0,0,0,114,95,0,0,0,41,9,
-    114,15,0,0,0,114,152,0,0,0,114,153,0,0,0,90,
-    9,105,115,95,114,101,108,111,97,100,114,172,0,0,0,114,
-    154,0,0,0,114,88,0,0,0,114,89,0,0,0,114,95,
+    114,21,0,0,0,114,166,0,0,0,114,155,0,0,0,114,
+    96,0,0,0,114,174,0,0,0,114,95,0,0,0,41,9,
+    114,15,0,0,0,114,153,0,0,0,114,154,0,0,0,90,
+    9,105,115,95,114,101,108,111,97,100,114,173,0,0,0,114,
+    155,0,0,0,114,88,0,0,0,114,89,0,0,0,114,95,
     0,0,0,114,10,0,0,0,114,10,0,0,0,114,11,0,
     0,0,218,10,95,102,105,110,100,95,115,112,101,99,111,3,
     0,0,115,48,0,0,0,0,2,25,1,16,4,15,1,16,
     1,10,1,3,1,13,1,13,1,18,1,12,1,8,2,25,
     1,12,2,22,1,13,1,3,1,13,1,13,4,9,2,12,
-    1,4,2,7,2,8,2,114,176,0,0,0,99,3,0,0,
+    1,4,2,7,2,8,2,114,177,0,0,0,99,3,0,0,
     0,0,0,0,0,4,0,0,0,4,0,0,0,67,0,0,
     0,115,179,0,0,0,116,0,0,124,0,0,116,1,0,131,
     2,0,115,42,0,116,2,0,100,1,0,106,3,0,116,4,
@@ -1638,14 +1638,14 @@ const unsigned char _Py_M__importlib[] = {
     101,32,110,97,109,101,78,41,9,218,10,105,115,105,110,115,
     116,97,110,99,101,218,3,115,116,114,218,9,84,121,112,101,
     69,114,114,111,114,114,50,0,0,0,114,13,0,0,0,114,
-    168,0,0,0,114,14,0,0,0,114,21,0,0,0,218,11,
+    169,0,0,0,114,14,0,0,0,114,21,0,0,0,218,11,
     83,121,115,116,101,109,69,114,114,111,114,41,4,114,15,0,
-    0,0,114,169,0,0,0,114,170,0,0,0,114,147,0,0,
+    0,0,114,170,0,0,0,114,171,0,0,0,114,148,0,0,
     0,114,10,0,0,0,114,10,0,0,0,114,11,0,0,0,
     218,13,95,115,97,110,105,116,121,95,99,104,101,99,107,151,
     3,0,0,115,24,0,0,0,0,2,15,1,27,1,12,1,
     12,1,6,1,15,1,15,1,15,1,6,2,21,1,19,1,
-    114,181,0,0,0,122,16,78,111,32,109,111,100,117,108,101,
+    114,182,0,0,0,122,16,78,111,32,109,111,100,117,108,101,
     32,110,97,109,101,100,32,122,4,123,33,114,125,99,2,0,
     0,0,0,0,0,0,8,0,0,0,12,0,0,0,67,0,
     0,0,115,40,1,0,0,100,0,0,125,2,0,124,0,0,
@@ -1669,21 +1669,21 @@ const unsigned char _Py_M__importlib[] = {
     100,5,0,25,124,7,0,131,3,0,1,124,7,0,83,41,
     6,78,114,121,0,0,0,114,33,0,0,0,122,23,59,32,
     123,33,114,125,32,105,115,32,110,111,116,32,97,32,112,97,
-    99,107,97,103,101,114,15,0,0,0,114,140,0,0,0,41,
+    99,107,97,103,101,114,15,0,0,0,114,141,0,0,0,41,
     12,114,122,0,0,0,114,14,0,0,0,114,21,0,0,0,
     114,65,0,0,0,114,131,0,0,0,114,96,0,0,0,218,
     8,95,69,82,82,95,77,83,71,114,50,0,0,0,114,77,
-    0,0,0,114,176,0,0,0,114,149,0,0,0,114,5,0,
+    0,0,0,114,177,0,0,0,114,150,0,0,0,114,5,0,
     0,0,41,8,114,15,0,0,0,218,7,105,109,112,111,114,
-    116,95,114,152,0,0,0,114,123,0,0,0,90,13,112,97,
-    114,101,110,116,95,109,111,100,117,108,101,114,147,0,0,0,
+    116,95,114,153,0,0,0,114,123,0,0,0,90,13,112,97,
+    114,101,110,116,95,109,111,100,117,108,101,114,148,0,0,0,
     114,88,0,0,0,114,89,0,0,0,114,10,0,0,0,114,
     10,0,0,0,114,11,0,0,0,218,23,95,102,105,110,100,
     95,97,110,100,95,108,111,97,100,95,117,110,108,111,99,107,
     101,100,171,3,0,0,115,42,0,0,0,0,1,6,1,19,
     1,6,1,15,1,13,2,15,1,11,1,13,1,3,1,13,
     1,13,1,22,1,26,1,15,1,12,1,30,2,12,1,6,
-    2,13,1,29,1,114,184,0,0,0,99,2,0,0,0,0,
+    2,13,1,29,1,114,185,0,0,0,99,2,0,0,0,0,
     0,0,0,2,0,0,0,10,0,0,0,67,0,0,0,115,
     37,0,0,0,116,0,0,124,0,0,131,1,0,143,18,0,
     1,116,1,0,124,0,0,124,1,0,131,2,0,83,87,100,
@@ -1691,11 +1691,11 @@ const unsigned char _Py_M__importlib[] = {
     100,32,97,110,100,32,108,111,97,100,32,116,104,101,32,109,
     111,100,117,108,101,44,32,97,110,100,32,114,101,108,101,97,
     115,101,32,116,104,101,32,105,109,112,111,114,116,32,108,111,
-    99,107,46,78,41,2,114,54,0,0,0,114,184,0,0,0,
-    41,2,114,15,0,0,0,114,183,0,0,0,114,10,0,0,
+    99,107,46,78,41,2,114,54,0,0,0,114,185,0,0,0,
+    41,2,114,15,0,0,0,114,184,0,0,0,114,10,0,0,
     0,114,10,0,0,0,114,11,0,0,0,218,14,95,102,105,
     110,100,95,97,110,100,95,108,111,97,100,198,3,0,0,115,
-    4,0,0,0,0,2,13,1,114,185,0,0,0,114,33,0,
+    4,0,0,0,0,2,13,1,114,186,0,0,0,114,33,0,
     0,0,99,3,0,0,0,0,0,0,0,5,0,0,0,4,
     0,0,0,67,0,0,0,115,166,0,0,0,116,0,0,124,
     0,0,124,1,0,124,2,0,131,3,0,1,124,2,0,100,
@@ -1731,16 +1731,16 @@ const unsigned char _Py_M__importlib[] = {
     78,122,40,105,109,112,111,114,116,32,111,102,32,123,125,32,
     104,97,108,116,101,100,59,32,78,111,110,101,32,105,110,32,
     115,121,115,46,109,111,100,117,108,101,115,114,15,0,0,0,
-    41,12,114,181,0,0,0,114,171,0,0,0,114,57,0,0,
-    0,114,145,0,0,0,114,14,0,0,0,114,21,0,0,0,
-    114,185,0,0,0,218,11,95,103,99,100,95,105,109,112,111,
+    41,12,114,182,0,0,0,114,172,0,0,0,114,57,0,0,
+    0,114,146,0,0,0,114,14,0,0,0,114,21,0,0,0,
+    114,186,0,0,0,218,11,95,103,99,100,95,105,109,112,111,
     114,116,114,58,0,0,0,114,50,0,0,0,114,77,0,0,
-    0,114,63,0,0,0,41,5,114,15,0,0,0,114,169,0,
-    0,0,114,170,0,0,0,114,89,0,0,0,114,74,0,0,
+    0,114,63,0,0,0,41,5,114,15,0,0,0,114,170,0,
+    0,0,114,171,0,0,0,114,89,0,0,0,114,74,0,0,
     0,114,10,0,0,0,114,10,0,0,0,114,11,0,0,0,
-    114,186,0,0,0,204,3,0,0,115,28,0,0,0,0,9,
+    114,187,0,0,0,204,3,0,0,115,28,0,0,0,0,9,
     16,1,12,1,18,1,10,1,15,1,13,1,13,1,12,1,
-    10,1,6,1,9,1,18,1,10,1,114,186,0,0,0,99,
+    10,1,6,1,9,1,18,1,10,1,114,187,0,0,0,99,
     3,0,0,0,0,0,0,0,6,0,0,0,17,0,0,0,
     67,0,0,0,115,239,0,0,0,116,0,0,124,0,0,100,
     1,0,131,2,0,114,235,0,100,2,0,124,1,0,107,6,
@@ -1776,213 +1776,226 @@ const unsigned char _Py_M__importlib[] = {
     1,42,218,7,95,95,97,108,108,95,95,122,5,123,125,46,
     123,125,78,41,13,114,4,0,0,0,114,130,0,0,0,218,
     6,114,101,109,111,118,101,218,6,101,120,116,101,110,100,114,
-    188,0,0,0,114,50,0,0,0,114,1,0,0,0,114,65,
-    0,0,0,114,77,0,0,0,114,178,0,0,0,114,71,0,
+    189,0,0,0,114,50,0,0,0,114,1,0,0,0,114,65,
+    0,0,0,114,77,0,0,0,114,179,0,0,0,114,71,0,
     0,0,218,15,95,69,82,82,95,77,83,71,95,80,82,69,
     70,73,88,114,15,0,0,0,41,6,114,89,0,0,0,218,
-    8,102,114,111,109,108,105,115,116,114,183,0,0,0,218,1,
+    8,102,114,111,109,108,105,115,116,114,184,0,0,0,218,1,
     120,90,9,102,114,111,109,95,110,97,109,101,90,3,101,120,
     99,114,10,0,0,0,114,10,0,0,0,114,11,0,0,0,
     218,16,95,104,97,110,100,108,101,95,102,114,111,109,108,105,
     115,116,228,3,0,0,115,34,0,0,0,0,10,15,1,12,
     1,12,1,13,1,15,1,16,1,13,1,15,1,21,1,3,
-    1,17,1,18,4,21,1,15,1,3,1,26,1,114,194,0,
-    0,0,99,1,0,0,0,0,0,0,0,2,0,0,0,2,
-    0,0,0,67,0,0,0,115,72,0,0,0,124,0,0,106,
+    1,17,1,18,4,21,1,15,1,3,1,26,1,114,195,0,
+    0,0,99,1,0,0,0,0,0,0,0,3,0,0,0,5,
+    0,0,0,67,0,0,0,115,128,0,0,0,124,0,0,106,
     0,0,100,1,0,131,1,0,125,1,0,124,1,0,100,2,
-    0,107,8,0,114,68,0,124,0,0,100,3,0,25,125,1,
-    0,100,4,0,124,0,0,107,7,0,114,68,0,124,1,0,
-    106,1,0,100,5,0,131,1,0,100,6,0,25,125,1,0,
-    124,1,0,83,41,7,122,167,67,97,108,99,117,108,97,116,
-    101,32,119,104,97,116,32,95,95,112,97,99,107,97,103,101,
-    95,95,32,115,104,111,117,108,100,32,98,101,46,10,10,32,
-    32,32,32,95,95,112,97,99,107,97,103,101,95,95,32,105,
-    115,32,110,111,116,32,103,117,97,114,97,110,116,101,101,100,
-    32,116,111,32,98,101,32,100,101,102,105,110,101,100,32,111,
-    114,32,99,111,117,108,100,32,98,101,32,115,101,116,32,116,
-    111,32,78,111,110,101,10,32,32,32,32,116,111,32,114,101,
-    112,114,101,115,101,110,116,32,116,104,97,116,32,105,116,115,
-    32,112,114,111,112,101,114,32,118,97,108,117,101,32,105,115,
-    32,117,110,107,110,111,119,110,46,10,10,32,32,32,32,114,
-    134,0,0,0,78,114,1,0,0,0,114,131,0,0,0,114,
-    121,0,0,0,114,33,0,0,0,41,2,114,42,0,0,0,
-    114,122,0,0,0,41,2,218,7,103,108,111,98,97,108,115,
-    114,169,0,0,0,114,10,0,0,0,114,10,0,0,0,114,
-    11,0,0,0,218,17,95,99,97,108,99,95,95,95,112,97,
-    99,107,97,103,101,95,95,4,4,0,0,115,12,0,0,0,
-    0,7,15,1,12,1,10,1,12,1,19,1,114,196,0,0,
-    0,99,5,0,0,0,0,0,0,0,9,0,0,0,5,0,
-    0,0,67,0,0,0,115,227,0,0,0,124,4,0,100,1,
-    0,107,2,0,114,27,0,116,0,0,124,0,0,131,1,0,
-    125,5,0,110,54,0,124,1,0,100,2,0,107,9,0,114,
-    45,0,124,1,0,110,3,0,105,0,0,125,6,0,116,1,
-    0,124,6,0,131,1,0,125,7,0,116,0,0,124,0,0,
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 };