code: def acquire_account(self, account=None, owner=None):
          
          if account is not None:
              for _, pool in self.pools:
                  if pool.has_account(account):
                      return pool.acquire_account(account, owner)
  
              if not self.default_pool.has_account(account):
                  # The account is not in any pool.
                  account.acquire()
                  return account
  
          return self.default_pool.acquire_account(account, owner)
docs: Acquires the given account. If no account is given, one is chosen
          from the default pool.
  
          :type  account: Account
          :param account: The account that is added.
          :type  owner: object
          :param owner: An optional descriptor for the owner.
          :rtype:  :class:`Account`
          :return: The account that was acquired.