<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def bling(self, target, sender):
        "will print yo"
        if target.startswith("#"):
            self.message(target, "%s: yo" % sender)
        else:
            self.message(sender, "yo")