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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def calc_v_qa_v1(self):
 """Update the stored water volume based on the equation of continuity. Note that for too high outflow values, which would result in overdraining the lake, the outflow is trimmed. Required derived parameters: |Seconds| |NmbSubsteps| Required flux sequence: |QZ| Updated aide sequences: |llake_aides.QA| |llake_aides.V| Basic Equation: :math:`\\frac{dV}{dt}= QZ - QA` Examples: Prepare a lake model with an initial storage of 100.000 m³ and an inflow of 2 m³/s and a (potential) outflow of 6 m³/s: Through calling method `calc_v_qa_v1` three times with the same inflow and outflow values, the storage is emptied after the second step and outflow is equal to inflow after the third step: v(13600.0) qa(6.0) v(0.0) qa(2.62963) v(0.0) qa(2.0) Note that the results of method |calc_v_qa_v1| are not based depend on the (outer) simulation step size but on the (inner) calculation step size defined by parameter `maxdt`. """

    der = self.parameters.derived.fastaccess
    flu = self.sequences.fluxes.fastaccess
    aid = self.sequences.aides.fastaccess
    aid.qa = min(aid.qa, flu.qz+der.nmbsubsteps/der.seconds*aid.v)
    aid.v = max(aid.v+der.seconds/der.nmbsubsteps*(flu.qz-aid.qa), 0.)