Fix support of typing unicode chars in pyrepl

Author: sergey-miryanov

Lib/_pyrepl/base_eventqueue.py

@@ -74,8 +74,13 @@ def push(self, char: int | bytes) -> None:
         Processes a character by updating the buffer and handling special key mappings.
         """
         ord_char = char if isinstance(char, int) else ord(char)
-        char = bytes(bytearray((ord_char,)))
-        self.buf.append(ord_char)
+        if ord_char > 255:
+            char = bytes(char.encode(self.encoding))
+            self.buf.extend(char)
+        else:
+            char = bytes(bytearray((ord_char,)))
+            self.buf.append(ord_char)
+
         if char in self.keymap:
             if self.keymap is self.compiled_keymap:
                 # sanity check, buffer is empty when a special key comes

Lib/test/test_pyrepl/test_eventqueue.py

@@ -123,6 +123,13 @@ def test_push_unrecognized_escape_sequence(self):
         self.assertEqual(eq.events[2].evt, "key")
         self.assertEqual(eq.events[2].data, "Z")
 
+    def test_push_unicode_character(self):
+        eq = self.make_eventqueue()
+        eq.keymap = {}
+        eq.push("ч")
+        self.assertEqual(eq.events[0].evt, "key")
+        self.assertEqual(eq.events[0].data, "ч")
+
 
 @unittest.skipIf(support.MS_WINDOWS, "No Unix event queue on Windows")
 class TestUnixEventQueue(EventQueueTestBase, unittest.TestCase):