Update app.py

app.py

@@ -70,7 +70,7 @@ def kmeans(ligand,n_clusters,n_num):
     azip.extractall()
     peptide_folder_path = pathlib.Path(__file__).parent.joinpath("peptides" )
     pdb_folder = pathlib.Path(__file__).parent.joinpath("temp")
-    ligand_path = ligend.name
+    ligand_path = ligand.name
     shutil.copy(ligand_path,pdb_folder)
     n_num = int(n_num)
     n_clusters = int(n_clusters)