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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 output_all_points(self):
 """Return all points in the bank. Return all points in the bank as lists of m1, m2, spin1z, spin2z. Returns ------- mass1 : list List of mass1 values. mass2 : list List of mass2 values. spin1z : list List of spin1z values. spin2z : list List of spin2z values. """

        mass1 = []
        mass2 = []
        spin1z = []
        spin2z = []
        for i in self.massbank.keys():
            for j in self.massbank[i].keys():
                for k in xrange(len(self.massbank[i][j]['mass1s'])):
                    curr_bank = self.massbank[i][j]
                    mass1.append(curr_bank['mass1s'][k])
                    mass2.append(curr_bank['mass2s'][k])
                    spin1z.append(curr_bank['spin1s'][k])
                    spin2z.append(curr_bank['spin2s'][k])

        return mass1, mass2, spin1z, spin2z