From cd1c9d8bb36d1f3ab21da10ceb20aaae817a7e2a Mon Sep 17 00:00:00 2001
From: "Anna (Anya) Parker" <50943381+anna-parker@users.noreply.github.com>
Date: Tue, 9 Jul 2024 09:48:41 +0200
Subject: [PATCH] Fix None vs not error.

---
 preprocessing/nextclade/src/loculus_preprocessing/prepro.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/preprocessing/nextclade/src/loculus_preprocessing/prepro.py b/preprocessing/nextclade/src/loculus_preprocessing/prepro.py
index 87fc96536..f8583f459 100644
--- a/preprocessing/nextclade/src/loculus_preprocessing/prepro.py
+++ b/preprocessing/nextclade/src/loculus_preprocessing/prepro.py
@@ -386,7 +386,7 @@ def add_input_metadata(
     nextclade_prefix = "nextclade."
     if input_path.startswith(nextclade_prefix):
         segment = spec.args.get("segment", "main")
-        if unprocessed.nextcladeMetadata is None:
+        if not unprocessed.nextcladeMetadata:
             errors.append(
                 ProcessingAnnotation(
                     source=[