diff --git a/parse.py b/parse.py
index 24abd8c..1cdeaac 100644
--- a/parse.py
+++ b/parse.py
@@ -60,13 +60,22 @@ def parse(input, format, **kwargs):
     
     return schematic
 
+def main(args):
+    schematic = parse(**vars(args))
+    
+    if args.output:
+        json_file = open(args.output, 'w')
+        json.dump(schematic, json_file, indent=4)
+    else:
+        print(schematic)
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description='Converts Altium .SchDoc files into json.', formatter_class=argparse.RawTextHelpFormatter)
     parser.add_argument('--input', '-i', dest='input',
                         help='path/to/altiumschematic.schdoc file to parse')
     parser.add_argument('--output', '-o', dest='output',
                         help='path/to/jsonfile.json file to output json to, otherwise prints to terminal')
-    parser.add_argument('format', default='hierarchy', nargs='?',
+    parser.add_argument('format', nargs='?', default='json-hierarchy',
                         choices=['json-flat', 'json-hierarchy', 'parts-list', 'net-list'],
                         help=textwrap.dedent('''\
                         json-flat, json-hierarchy: Organize records into owner/child "hierarchy" or leave as a "flat" list
@@ -74,10 +83,4 @@ if __name__ == "__main__":
                         net-list: A listing of nets between parts pins, referred to by their designators'''))
     
     args = parser.parse_args()
-    schematic = parse(**vars(args))
-    
-    if args.output:
-        json_file = open(args.output, 'w')
-        json.dump(schematic, json_file, indent=4)
-    else:
-        print(schematic)
\ No newline at end of file
+    main(args)
\ No newline at end of file