diff --git a/enpass-to-keepass.py b/enpass-to-keepass.py
index bbd8914..4f2b152 100755
--- a/enpass-to-keepass.py
+++ b/enpass-to-keepass.py
@@ -12,76 +12,82 @@
 import csv
 import json
 
-ALLOWED_FIELDS = ['website', 'username', 'password']
-HEADERS = ['title', 'website', 'username', 'password', 'group', 'notes']
+ALLOWED_FIELDS = ['website', "username", 'password']
+HEADERS = ["title", 'website', "username", 'password', "group", "notes"]
 
 extra_keys = set([])
 
-def main(args):
-    results = []
-    with open('export.json') as json_file:
-        data = json.load(json_file)
-        folders = data['folders']
-        items = data['items']
-
-        for item in items:
-            results.append(processItem(item, folders))
-
-    if (len(results) == 0):
-        print('No rows to write (empty input file?)')
-        return
-
-    print('%d rows processed' % len(results))
-    print('Writing to %s' % args.output_file.name)
-    if (len(extra_keys) > 0):
-        print('Found extra keys: ' + ', '.join(extra_keys))
-
-    writer = csv.DictWriter(args.output_file, HEADERS)
-    writer.writeheader()
-    writer.writerows(results)
-
 
-def processItem(item, folders):
-    print('Reading item: ' + item['title'])
+def process_item(item, folders):
+    print(f"Reading item: {item['title']}")
     result = {
-        'title': item['title'],
-        'notes': item['subtitle'] + '\n\n\n'
+        "title": item["title"],
+        "notes": item['subtitle'] + '\n\n\n'
     }
 
-    if item.get('folders'):
+    if folders and item.get("folders"):
         for folder in folders:
-            if folder['uuid'] == item['folders'][0]:
-                result['group'] = folder['title']
+            if folder["uuid"] == item["folders"][0]:
+                result["group"] = folder["title"]
                 break
 
-    email = ''
-    username = ''
+    email = ""
+    username = ""
 
-    for field in item.get('fields', []):
-        if field['label'] in result or field['label'].lower() not in ALLOWED_FIELDS:
-            if field['label'].lower() == 'e-mail':
-                email = field['value']
+    for field in item.get("fields", []):
+        if field.get("label", "").lower() not in ALLOWED_FIELDS:
+            if field["label"].lower() == 'e-mail':
+                email = field["value"]
                 continue
 
-            result['notes'] += "%s\n%s\n\n" % (field['label'], field['value'])
-            extra_keys.add(field['label'])
+            result["notes"] += "%s\n%s\n\n" % (field["label"], field["value"])
+            extra_keys.add(field["label"])
         else:
-            result[field['label'].lower()] = field['value']
-            if field['label'].lower() == 'username':
-                username = field['value']
+            result[field["label"].lower()] = field["value"]
+            if field["label"].lower() == "username":
+                username = field["value"]
 
-    result['notes'] += "NOTES\n\n" + item['note']
+    result["notes"] += "NOTES\n\n" + item["note"]
     if not username and email:
-        result['username'] = email
+        result["username"] = email
     else:
-        result['notes'] += "E-mail\n" + email
+        result["notes"] += "E-mail\n" + email
 
     return result
 
+
+def convert_enpass_to_keypass(input_file, output_file):
+    with input_file as json_file:
+        data = json.load(json_file)
+
+    if not data:
+        print("No JSON data load from {args.input_file.name}")
+        return
+
+    folders = data.get("folders")
+    items = data.get("items")
+
+    results = [process_item(item, folders) for item in items]
+
+    if not results:
+        print("No rows to write (empty input file?)")
+        return
+
+    print(f"{len(results)} rows processed")
+    print(f"Writing to {output_file.name}")
+    if extra_keys:
+        print(f"Found extra keys: {', '.join(extra_keys)}")
+
+    writer = csv.DictWriter(output_file, HEADERS)
+    writer.writeheader()
+    writer.writerows(results)
+
+
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawTextHelpFormatter)
     parser.add_argument('input_file', type=argparse.FileType('r'),
-                        help='Path to Enpass csv export file')
+                        help='Path to Enpass JSON export file')
     parser.add_argument('output_file', type=argparse.FileType('w'),
-                        help='Path to output file (csv)')
-    main(parser.parse_args())
+                        help='Path to output file (CSV)')
+    args = parser.parse_args()
+    convert_enpass_to_keypass(args.input_file, args.output_file)