How to Start WebLogic WLST

On WebLogic 12c 

Got to :
WL_HOME/user_projects/domain/domain_name/bin

Run :
> setDomainEnv.[sh|cmd]
> java weblogic.WLST
> java weblogic.WLST script.py

or on Windows, a shortcut on the Start menu sets the environment variables and invokes WLST (Tools—>WebLogic Scripting Tool).