<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def init0(self, dae):
 """Set initial p and q for power flow"""

        self.p0 = matrix(self.p, (self.n, 1), 'd')
        self.q0 = matrix(self.q, (self.n, 1), 'd')