<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def enable_i2c_slave(self, slave_address):
 """Enable I2C slave mode. The device will respond to the specified slave_address if it is addressed. You can wait for the data with :func:`poll` and get it with `i2c_slave_read`. """

        ret = api.py_aa_i2c_slave_enable(self.handle, slave_address,
                self.BUFFER_SIZE, self.BUFFER_SIZE)
        _raise_error_if_negative(ret)