Let user specify # kobolds in campaign

koboldgen.py

 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     group = parser.add_mutually_exclusive_group()
-    group.add_argument("-k", "--kobolds", help="print this many kobolds", type=int, default=1)
-    group.add_argument("-n", "--names", help="print this many kobolds without stat blocks", type=int)
-    group.add_argument("-s", "--ship", help="print only the ship name and description", action="store_true")
-    group.add_argument("-c", "--campaign", help="print a full campaign block with 6 kobolds", action="store_true")
+    group.add_argument("-c", "--campaign", help="print a full campaign block with N kobolds (default 6)", nargs="?", const=6, type=int, metavar="N")
+    group.add_argument("-k", "--kobolds", help="print N kobolds", type=int, nargs="?", const=1, default=1, metavar="N")
+    group.add_argument("-n", "--names", help="print N kobolds without stat blocks", nargs="?", const=1, type=int, metavar="N")
     group.add_argument("-p", "--params", help="print only the parameters of a campaign", action="store_true")
+    group.add_argument("-s", "--ship", help="print only the ship name and description", action="store_true")
     args = parser.parse_args()
+    # print(args)
     if args.campaign:
-        cmp = Campaign()
+        cmp = Campaign(args.campaign)
         cmp.print_params()
         cmp.print_chars()
     elif args.params:
             c.generate()
             c.print_name()
     else:
-        for _ in range(args.num):
+        for _ in range(args.kobolds):
             c = Character()
             c.generate()
             c.print()