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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 get(account):
 """Returns the class object identified by `account_id` Args: account (`int`, `str`):
 Unique ID of the account to load from database Returns: `Account` object if found, else None """

        account = Account.get(account)
        if not account:
            return None

        acct_type = AccountType.get(account.account_type_id).account_type
        account_class = get_plugin_by_name(PLUGIN_NAMESPACES['accounts'], acct_type)

        return account_class(account)