Thank you for giving answers. I got it .I need to One command with arguments or parameters with python script that is very helpful one eg.
for example scan command will under come parameters like association time , unassociation time,passive time.like that please give example as like as above script. or not required to pass arguments? and some commands have wl join <ssid> [key <xxxxx>] [imode bss|infra|ibss|adhoc] ,where we can mentioned parameters or arguments in the script.
You can open the example_commands.txt and add "join <SSID_NAME> open none" command and you should be able to check the association process. Note the SSID you are connecting to should be of WICED_SECURITY_OPEN category for mfg_test firmware