diff --git a/VIIRSdownloader.py b/VIIRSdownloader.py
index 1dd058e..bb0e0e4 100644
--- a/VIIRSdownloader.py
+++ b/VIIRSdownloader.py
@@ -17,13 +17,12 @@ import webbrowser
 import requests
 import pandas as pd
 import folium
-
 from geopy.geocoders import Nominatim
 from geopy.extra.rate_limiter import RateLimiter
 
 
 def check_file_format(args_inputfile):
-    pattern = re.compile(r'local_VIIRS_data-\d\d\d\d-\d\d-\d\d.csv')
+    pattern = re.compile(r'local_VIIRS_data-\d{4}-\d{2}-\d{2}.csv')
     if not re.match(pattern, args_inputfile):
         raise argparse.ArgumentTypeError
     return args_inputfile
@@ -65,10 +64,8 @@ def render_map(in_ukraine, address_list, date):
                                             str(address.raw['display_name'])),
                                         radius=10).add_to(fire_map)
     else:
-
         fire_map = folium.Map(location=[(44.184598 + 52.3797464)/2, (22.137059 + 40.2275801)/2],
                               zoom_start=4, max_bounds=True, crs='EPSG3857')
-
     folium.raster_layers.TileLayer(
         tiles=src,
         subdomains='abc',
@@ -103,7 +100,6 @@ def main(args):
                 raise SystemExit(e)
         except requests.exceptions.RequestException as e:
             raise SystemExit(e)
-
     html_file = local_file.split('.')[0] + '.html'
     data_frame = pd.read_csv(local_file)
     data_frame = data_frame.astype({'confidence': 'string'})