<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def connect(self, ctx):
 """ establish xbahn connection and store on click context """


        if hasattr(ctx,"conn") or "host" not in ctx.params:
            return

        ctx.conn = conn = connect(ctx.params["host"])
        lnk = link.Link()
        lnk.wire("main", receive=conn, send=conn)
        ctx.client = api.Client(link=lnk)
        ctx.widget = ClientWidget(ctx.client, "engineer")