sta_scan_test.py : fixed imports

tip_station_powersave.py : added --help
lf_qa.py : fixed comments in help

Signed-off-by: Chuck SmileyRekiere <chuck.smileyrekiere@candelatech.com>

py-scripts/tip_station_powersave.py

@@ -5,6 +5,7 @@ import importlib
 import pprint
 import time
 import datetime
+import argparse
 
 if sys.version_info[0] != 3:
     print("This script requires Python 3")
@@ -380,6 +381,26 @@ class TIPStationPowersave(LFCliBase):
         self.sta_powersave_disabled_profile.cleanup(desired_stations=self.normal_sta_list)
 
 def main():
+
+    parser = argparse.ArgumentParser(
+        prog='tip_station_powersave.py',
+        formatter_class=argparse.RawTextHelpFormatter,
+        epilog='''\
+        tip_station_powersave.py
+
+            ''',
+        description='''\
+This script uses filters from realm's PacketFilter class to filter pcap output for specific packets.
+Currently it uses a filter for association packets using wlan.fc.type_subtype<=3. It is also using a filter
+for QOS Null packets using wlan.fc.type_subtype==44. Both filters are also looking for the existence of 
+either the station MAC or the AP MAC in wlan.addr
+These are returned as an array of lines from the output in the format
+$subtype $mac_addresses $wlan.fc.pwrmgt
+
+#Currently, this test can only be applied to UDP connections
+        ''')
+    args = parser.parse_args()        
+
     lfjson_host = "localhost"
     lfjson_port = 8080
     #station_list = LFUtils.portNameSeries(prefix_="sta", start_id_=0, end_id_=4, padding_number_=10000)