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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 from_dynacRepr(cls, pynacRepr):
 """ Construct a ``Steerer`` instance from the Pynac lattice element """

        f = float(pynacRepr[1][0][0])
        p = 'HV'[int(pynacRepr[1][0][1])]
        return cls(f, p)