code: def generate(cls, public_keys, amount):
          
          threshold = len(public_keys)
          if not isinstance(amount, int):
              raise TypeError('`amount` must be a int')
          if amount < 1:
              raise AmountError('`amount` needs to be greater than zero')
          if not isinstance(public_keys, list):
              raise TypeError('`public_keys` must be an instance of list')
          if len(public_keys) == 0:
              raise ValueError('`public_keys` needs to contain at least one'
                               'owner')
          elif len(public_keys) == 1 and not isinstance(public_keys[0], list):
              if isinstance(public_keys[0], Fulfillment):
                  ffill = public_keys[0]
              else:
                  ffill = Ed25519Sha256(
                      public_key=base58.b58decode(public_keys[0]))
              return cls(ffill, public_keys, amount=amount)
          else:
              initial_cond = ThresholdSha256(threshold=threshold)
              threshold_cond = reduce(cls._gen_condition, public_keys,
                                      initial_cond)
              return cls(threshold_cond, public_keys, amount=amount)
docs: Generates a Output from a specifically formed tuple or list.
  
              Note:
                  If a ThresholdCondition has to be generated where the threshold
                  is always the number of subconditions it is split between, a
                  list of the following structure is sufficient:
  
                  [(address|condition)*, [(address|condition)*, ...], ...]
  
              Args:
                  public_keys (:obj:`list` of :obj:`str`): The public key of
                      the users that should be able to fulfill the Condition
                      that is being created.
                  amount (:obj:`int`): The amount locked by the Output.
  
              Returns:
                  An Output that can be used in a Transaction.
  
              Raises:
                  TypeError: If `public_keys` is not an instance of `list`.
                  ValueError: If `public_keys` is an empty list.