Added more code-comments and shorted a line that was too long.

exif_rad.py

@@ -42,17 +42,20 @@ for photo in args.photos:
     # Load Image and EXIF data
     im = Image.open(photo)
     exif_dict = piexif.load(im.info['exif'])
+    # Get image file name out of path
     photo_basename = os.path.basename(photo)
     
     # Import GeigerCounter log
     with open(args.csv, "r") as f:
-        csvreader = csv.reader(filter(lambda row: row[0]!='#', f), delimiter=',', skipinitialspace=True)
+        csvreader = csv.reader(filter(lambda row: row[0] != '#', f), 
+                               delimiter=',', skipinitialspace=True)
 
         picrawtime = exif_dict['Exif'][piexif.ExifIFD.DateTimeOriginal].decode('ASCII')
         picisotime = datetime.strptime(picrawtime, "%Y:%m:%d %H:%M:%S")
         print('Processing file:', photo_basename, end='\r')
         for _, csvrawtime, csvrawcpm, _ in csvreader:
             csvisotime = datetime.fromisoformat(csvrawtime)
+            # Process image if its timestamp is found in CSV log
             if csvisotime == picisotime:
                 rad = round(float(csvrawcpm) * args.sifactor, 2)
 
@@ -72,4 +75,5 @@ for photo in args.photos:
                 break
         else:
             print('{:<30} {:<20} {:<22}'.format(photo_basename, str(picisotime), 'NOT FOUND!'))
+    # close CSV file
     f.close()