[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

home/widgets.py

@@ -1,7 +1,7 @@
 """AiiDAlab basic widgets."""
 
-from datetime import datetime
 import subprocess
+from datetime import datetime
 from threading import Timer
 
 import ipywidgets as ipw