Allow using the ask kitten to pick a choice

kittens/tui/utils.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+import sys
+from contextlib import suppress
+
+from .operations import raw_mode, set_cursor_visible
+
+
+def get_key_press(allowed: str, default: str) -> str:
+    response = default
+    with raw_mode():
+        print(set_cursor_visible(False), end='', flush=True)
+        try:
+            while True:
+                q = sys.stdin.buffer.read(1)
+                if q:
+                    if q in b'\x1b\x03':
+                        break
+                    with suppress(Exception):
+                        response = q.decode('utf-8').lower()
+                        if response in allowed:
+                            break
+        except (KeyboardInterrupt, EOFError):
+            pass
+        finally:
+            print(set_cursor_visible(True), end='', flush=True)
+    return response