fix syntax

app.py

@@ -63,7 +63,7 @@ neighbors = []
 for seed_gene_id in seed_gene_ids:
     neighbors.append(
         top_coexp_hits[
-            (top_coexp_hits.gene_id_1 == seed_gene_id) and (top_coexp_hits.coexp_score > coexp_score_threshold)])
+            (top_coexp_hits.gene_id_1 == seed_gene_id) & (top_coexp_hits.coexp_score > coexp_score_threshold)])
 
 neighbors = pd.concat(neighbors)