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

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

scripts/_helpers.py

@@ -36,6 +36,7 @@ def get_opt(opts, expr, flags=None):
             return match.group(0)
     return None
 
+
 def find_opt(opts, expr):
     """
     Return if available the float after the expression.
@@ -49,6 +50,7 @@ def find_opt(opts, expr):
                 return True, None
     return False, None
 
+
 # Define a context manager to temporarily mute print statements
 @contextlib.contextmanager
 def mute_print():

scripts/prepare_network.py

@@ -63,7 +63,7 @@ import re
 import numpy as np
 import pandas as pd
 import pypsa
-from _helpers import configure_logging, get_opt, find_opt
+from _helpers import configure_logging, find_opt, get_opt
 from add_electricity import load_costs, update_transmission_costs
 from pypsa.descriptors import expand_series