Use lambda when sorting tuples

Sorting tuples of (datetime, message) requires using a lambda so Python
doesn't try to compare messages.

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/peebz/__init__.py b/peebz/__init__.py
index f2d2024..05c48e2 100644
--- a/peebz/__init__.py
+++ b/peebz/__init__.py
@@ -548,7 +548,7 @@ def sort_msgs_by_received(msgs: List[email.message.EmailMessage]) -> List[email.
         tosort.append((latest_rdt, msg))
 
     sortedmsgs = list()
-    for rdt, msg in sorted(tosort):
+    for rdt, msg in sorted(tosort, key=lambda x: x[0]):
         sortedmsgs.append(msg)
 
     return sortedmsgs