code: def getExpirations(self, contract_identifier, expired=0):
          
          expirations = []
          contracts = self.contractDetails(contract_identifier)["contracts"]
  
          if contracts[0].m_secType not in ("FUT", "FOP", "OPT"):
              return []
  
          # collect expirations
          for contract in contracts:
              expirations.append(contract.m_expiry)
  
          # convert to ints
          expirations = list(map(int, expirations))
          # expirations = list(set(expirations))
  
          # remove expired contracts
          today = int(datetime.now().strftime("%Y%m%d"))
          closest = min(expirations, key=lambda x: abs(x - today))
          expirations = expirations[expirations.index(closest) - expired:]
  
          return tuple(expirations)
docs: return expiration of contract / "multi" contract's contracts