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-rw-r--r--Python/ceval.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/Python/ceval.c b/Python/ceval.c
index fad8c2b..8b7447c 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -1008,11 +1008,12 @@ eval_code2(co, globals, locals,
case PRINT_EXPR:
v = POP();
- /* Print value except if procedure result */
- /* Before printing, also assign to '_' */
+ /* Print value except if None */
+ /* After printing, also assign to '_' */
+ /* Before, set '_' to None to avoid recursion */
if (v != Py_None &&
(err = PyDict_SetItemString(
- f->f_builtins, "_", v)) == 0) {
+ f->f_builtins, "_", Py_None)) == 0) {
err = Py_FlushLine();
if (err == 0) {
x = PySys_GetObject("stdout");
@@ -1025,6 +1026,10 @@ eval_code2(co, globals, locals,
PyFile_SoftSpace(x, 1);
err = Py_FlushLine();
}
+ if (err == 0) {
+ err = PyDict_SetItemString(
+ f->f_builtins, "_", v);
+ }
}
Py_DECREF(v);
break;