gh-155358: Use named attributes with os module (#155366)

Replace os.stat() result:

* st[1] => st.st_ino
* st[6] => st.st_size
* st[ST_MTIME] => st_mtime: change int type to float

Author: vstinner

Lib/http/server.py

@@ -857,7 +857,7 @@ def send_head(self):
 
             self.send_response(HTTPStatus.OK)
             self.send_header("Content-type", ctype)
-            self.send_header("Content-Length", str(fs[6]))
+            self.send_header("Content-Length", str(fs.st_size))
             self.send_header("Last-Modified",
                 self.date_time_string(fs.st_mtime))
             self._send_extra_response_headers()

Lib/test/test_os/test_posix.py

@@ -1823,8 +1823,8 @@ def test_link_dir_fd(self):
                 self.skipTest('posix.link(): %s' % e)
             self.addCleanup(posix.unlink, fulllinkname)
             # should have same inodes
-            self.assertEqual(posix.stat(fullname)[1],
-                posix.stat(fulllinkname)[1])
+            self.assertEqual(posix.stat(fullname).st_ino,
+                             posix.stat(fulllinkname).st_ino)
 
     @unittest.skipUnless(os.mkdir in os.supports_dir_fd, "test needs dir_fd support in os.mkdir()")
     def test_mkdir_dir_fd(self):

Tools/c-analyzer/distutils/dep_util.py

@@ -20,9 +20,8 @@ def newer (source, target):
     if not os.path.exists(target):
         return 1
 
-    from stat import ST_MTIME
-    mtime1 = os.stat(source)[ST_MTIME]
-    mtime2 = os.stat(target)[ST_MTIME]
+    mtime1 = os.stat(source).st_mtime
+    mtime2 = os.stat(target).st_mtime
 
     return mtime1 > mtime2