<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def setattr(d, **kwarg):
 """Set an attribute. set attributes is actually add a special key, value pair in this dict under key = "_meta". Usage:: {'_meta': {'population': 27800000, '_rootname': 'US'}} """

        if _meta not in d:
            d[_meta] = dict()
        for k, v in kwarg.items():
            d[_meta][k] = v