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

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

scripts/helpers.py

@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
 import logging
-import subprocess
 import os
 import shutil
+import subprocess
 import zipfile
 from pathlib import Path
 

scripts/solve_network.py

@@ -8,8 +8,7 @@
 import numpy as np
 import pandas as pd
 import pypsa
-from helpers import override_component_attrs
-from helpers import update_config
+from helpers import override_component_attrs, update_config
 from pypsa.linopf import ilopf, network_lopf
 from pypsa.linopt import define_constraints, get_var, join_exprs, linexpr
 from vresutils.benchmark import memory_logger