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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 get_cohp(self, spin=None, integrated=False):
 """ Returns the COHP or ICOHP for a particular spin. Args: spin: Spin. Can be parsed as spin object, integer (-1/1) or str ("up"/"down") integrated: Return COHP (False) or ICOHP (True) Returns: Returns the CHOP or ICOHP for the input spin. If Spin is None and both spins are present, both spins will be returned as a dictionary. """

        if not integrated:
            populations = self.cohp
        else:
            populations = self.icohp

        if populations is None:
            return None
        elif spin is None:
            return populations
        else:
            if isinstance(spin, int):
                spin = Spin(spin)
            elif isinstance(spin, str):
                s = {"up": 1, "down": -1}[spin.lower()]
                spin = Spin(s)
            return {spin: populations[spin]}