<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def attrput(self, groupname, attrname, rownr, value, unit=[], meas=[]):
 """Put the value and optionally unit and measinfo of an attribute in a row in a group."""

        return self._attrput(groupname, attrname, rownr, value, unit, meas)