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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 validate_transaction(self, tx, current_transactions=[]):
 """Validate a transaction against the current status of the database."""


        transaction = tx

        # CLEANUP: The conditional below checks for transaction in dict format.
        # It would be better to only have a single format for the transaction
        # throught the code base.
        if isinstance(transaction, dict):
            try:
                transaction = Transaction.from_dict(tx)
            except SchemaValidationError as e:
                logger.warning('Invalid transaction schema: %s', e.__cause__.message)
                return False
            except ValidationError as e:
                logger.warning('Invalid transaction (%s): %s', type(e).__name__, e)
                return False
        return transaction.validate(self, current_transactions)