gh-93741: Add private C API _PyImport_GetModuleAttrString() (GH-93742)

It combines PyImport_ImportModule() and PyObject_GetAttrString()
and saves 4-6 lines of code on every use.

Add also _PyImport_GetModuleAttr() which takes Python strings as arguments.

2 files changed, 6 insertions, 12 deletions

diff --git a/Parser/pegen.c b/Parser/pegen.c
index ec4fee3..dbf105a 100644
--- a/Parser/pegen.c
+++ b/Parser/pegen.c
@@ -77,13 +77,7 @@ init_normalization(Parser *p)
     if (p->normalize) {
         return 1;
     }
-    PyObject *m = PyImport_ImportModule("unicodedata");
-    if (!m)
-    {
-        return 0;
-    }
-    p->normalize = PyObject_GetAttrString(m, "normalize");
-    Py_DECREF(m);
+    p->normalize = _PyImport_GetModuleAttrString("unicodedata", "normalize");
     if (!p->normalize)
     {
         return 0;
diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
index d5b549c..952265e 100644
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -421,7 +421,7 @@ error:
 static int
 fp_setreadl(struct tok_state *tok, const char* enc)
 {
-    PyObject *readline, *io, *stream;
+    PyObject *readline, *open, *stream;
     int fd;
     long pos;
 
@@ -438,13 +438,13 @@ fp_setreadl(struct tok_state *tok, const char* enc)
         return 0;
     }
 
-    io = PyImport_ImportModule("io");
-    if (io == NULL) {
+    open = _PyImport_GetModuleAttrString("io", "open");
+    if (open == NULL) {
         return 0;
     }
-    stream = _PyObject_CallMethod(io, &_Py_ID(open), "isisOOO",
+    stream = PyObject_CallFunction(open, "isisOOO",
                     fd, "r", -1, enc, Py_None, Py_None, Py_False);
-    Py_DECREF(io);
+    Py_DECREF(open);
     if (stream == NULL) {
         return 0;
     }