code: def to_dict(self):
          
          return {
              '1Q': {
                  "{}".format(qs.id): {
                      'f1QRB': qs.f1QRB,
                      'fRO': qs.fRO,
                      'T1': qs.T1,
                      'T2': qs.T2,
                      'fActiveReset': qs.fActiveReset
                  } for qs in self.qubits_specs
              },
              '2Q': {
                  "{}-{}".format(*es.targets): {
                      'fBellState': es.fBellState,
                      'fCZ': es.fCZ,
                      'fCZ_std_err': es.fCZ_std_err,
                      'fCPHASE': es.fCPHASE
                  } for es in self.edges_specs
              }
          }
docs: Create a JSON-serializable representation of the device Specs.
  
          The dictionary representation is of the form::
  
              {
                  '1Q': {
                      "0": {
                          "f1QRB": 0.99,
                          "T1": 20e-6,
                          ...
                      },
                      "1": {
                          "f1QRB": 0.989,
                          "T1": 19e-6,
                          ...
                      },
                      ...
                  },
                  '2Q': {
                      "1-4": {
                          "fBellState": 0.93,
                          "fCZ": 0.92,
                          "fCZ_std_err": 0.03,
                          "fCPHASE": 0.91
                      },
                      "1-5": {
                          "fBellState": 0.9,
                          "fCZ": 0.89,
                          "fCZ_std_err": 0.05,
                          "fCPHASE": 0.88
                      },
                      ...
                  },
                  ...
              }
  
          :return: A dctionary representation of self.
          :rtype: Dict[str, Any]