commands/thread: replace isinstance() with hasattr()

This is more correct.

1 files changed, 2 insertions, 3 deletions

diff --git a/alot/commands/thread.py b/alot/commands/thread.py
index 89b278ce..26045ca8 100644
--- a/alot/commands/thread.py
+++ b/alot/commands/thread.py
@@ -39,7 +39,6 @@ from ..settings.const import settings
 from ..helper import parse_mailcap_nametemplate
 from ..helper import split_commandstring
 from ..utils import argparse as cargparse
-from ..widgets.globals import AttachmentWidget
 
 MODE = 'thread'
 
@@ -834,7 +833,7 @@ class SaveAttachmentCommand(Command):
                 raise CommandCanceled()
         else:  # save focussed attachment
             focus = ui.get_deep_focus()
-            if isinstance(focus, AttachmentWidget):
+            if hasattr(focus, 'attachment'):
                 filename = focus.attachment.get_filename()
                 if not self.path:
                     msg = 'save attachment (%s) to ' % filename
@@ -973,7 +972,7 @@ class ThreadSelectCommand(Command):
         - if it is an attachment line, open the attachment"""
     async def apply(self, ui):
         focus = ui.get_deep_focus()
-        if isinstance(focus, AttachmentWidget):
+        if hasattr(focus, 'attachment'):
             logging.info('open attachment')
             await ui.apply_command(OpenAttachmentCommand(focus.attachment))
         else: