# HG changeset patch
# User Laman
# Date 2021-10-13 12:59:57
# Node ID c6a258063801905d490e1382d0c1c16e48350c12
# Parent  ddeb551e1404b4208110b9cc35d30e3873c9235e

a better CLI

diff --git a/rank_progress.py b/rank_progress.py
--- a/rank_progress.py
+++ b/rank_progress.py
@@ -1,13 +1,12 @@
-import sys
 import re
 from itertools import groupby
 from datetime import datetime
 import argparse
 
 parser = argparse.ArgumentParser()
-parser.add_argument("since")
-parser.add_argument("to", default=None)
-parser.add_argument("-c", "--country-code", default="CZ")
+parser.add_argument("since", help="a date in YYYYMMDD format")
+parser.add_argument("to", nargs="?", help="a date in YYYYMMDD format")
+parser.add_argument("-c", "--country-code", default="CZ", help="a two letter country code, default=CZ")
 
 args = parser.parse_args()