Fix bug: Help is not shown when running without any subcommand

bin/psot

@@ -9,6 +9,7 @@ import tempfile
 
 def main():
     parser = argparse.ArgumentParser(description='Make bioinformatic observations on aminoacid sequences')
+    parser.set_defaults(func=help)
 
     subparsers = parser.add_subparsers()
     info_parser = subparsers.add_parser('info')
@@ -28,8 +29,12 @@ def main():
 
     args = parser.parse_args()
     config = load_config()
+    args.parser = parser
     args.func(args, config)
 
+def help(args, config):
+    args.parser.print_help()
+
 def info(args, config):
     show_analyses(config)