Update app.py

app.py

@@ -106,9 +106,8 @@ def update(sequence=DEFAULT_SEQ):
     name = sequence[:3] + sequence[-3:] 
     pdb_filename = "test.pdb"
     pdb_string = response.content.decode('utf-8')
-    tmp = 
-    with open(tmp.name, 'w') as f:
-        f.write(pdb_string)
+    with tempfile.TemporaryFile(mode = "w") as tmp:
+        tmp.write(pdb_string)
 
     return molecule(tmp.name), tmp.name