commit eff19a13ed4ca04e5be8c93a044952bad7de2054
author Benjamin Peterson <benjamin@python.org> Thu Mar 22 08:19:04 2012 -0400
committer Benjamin Peterson <benjamin@python.org> Thu Mar 22 08:19:04 2012 -0400
tree 6f269bbd8a46c7ed9ba3c86577215fab030038dd
parent 0e3c1075495dfc1ed481f65091d1f9241868324a

check by equality for __future__ not identity (closes #14378)

Python/future.c

diff --git a/Python/future.c b/Python/future.c
index 96be757..1ab7a1a 100644
--- a/Python/future.c
+++ b/Python/future.c
@@ -59,13 +59,6 @@
 {
     int i, found_docstring = 0, done = 0, prev_line = 0;
 
-    static PyObject *future;
-    if (!future) {
-        future = PyString_InternFromString("__future__");
-        if (!future)
-            return 0;
-    }
-
     if (!(mod->kind == Module_kind || mod->kind == Interactive_kind))
         return 1;
 
@@ -92,7 +85,9 @@
         */
 
         if (s->kind == ImportFrom_kind) {
-            if (s->v.ImportFrom.module == future) {
+            PyObject *modname = s->v.ImportFrom.module;
+            if (PyString_GET_SIZE(modname) == 10 &&
+                !strcmp(PyString_AS_STRING(modname), "__future__")) {
                 if (done) {
                     PyErr_SetString(PyExc_SyntaxError,
                                     ERR_LATE_FUTURE);