<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def i2c_bitrate(self):
 """I2C bitrate in kHz. Not every bitrate is supported by the host adapter. Therefore, the actual bitrate may be less than the value which is set. The power-on default value is 100 kHz. """


        ret = api.py_aa_i2c_bitrate(self.handle, 0)
        _raise_error_if_negative(ret)
        return ret