@@ -0,0 +1,15 @@
+### Python Challenge
+
+```
+Usage: xfipchk.py [-h] api_authN_file [ip_address]
+
+positional arguments:
+api_authN_file Path to a file containing your X-Force credentials, key and
+password on first and second lines, respectively.
+
+ip_address An IP address to be checked via X-Force. If the IP address
+is omitted or invalid, the user will be prompted for one.
+
+optional arguments:
+-h, --help show this help message and exit
+```

@@ -9,9 +9,12 @@
 
 def parse_args():
 parser = argparse.ArgumentParser()
-parser.add_argument('-x', '--xforce', required=True, type=argparse.FileType('r'), help='Path to a file containing '
-'your X-Force credentials.')
-parser.add_argument('address', nargs='?', help='An IP address to be checked via X-Force')
+parser.add_argument('api_authN_file', type=argparse.FileType('r'),
+help='Path to a file containing your X-Force credentials, key and password on first and second '
+'lines, respectively.')
+parser.add_argument('address', nargs='?', metavar='ip_address', help='An IP address to be checked via X-Force. If '
+'the IP address is omitted or invalid, the '
+'user will be prompted for one.')
 return parser.parse_args()
 
 
@@ -55,9 +58,12 @@ def main():
 url = "{}/{}/{}".format(XFORCE_API_BASE, XFORCE_API_IP_REP, ip)
 
 # get X-Force API keys
-creds = read_in_xforce_keys(args.xforce)
+creds = read_in_xforce_keys(args.api_authN_file)
 result = requests.get(url, auth=(creds[0], creds[1]))
+# maybe user swapped key and password in api creds file?
+# if result.status_code == '401':
 pprint.pprint(result.json())
+
 return 0