SoftI2C writeto problem

[kjm1102]

According to https://docs.micropython.org/en/latest/library/machine.I2C.html?highlight=softi2c#machine.SoftI2C the format for writing to a device is I2C.writeto(addr, buf, stop=True, /), but

import time; from machine import Pin,SoftI2C
i2c=SoftI2C(scl=Pin(10), sda=Pin(8), freq=10000)                                                                                                      # works up to freq=33k

addr=i2c.scan(); print('i2c device addresses', addr)                                                                                                  # 40h for i2c depth probe
buf=b''; i2c.writeto(40, buf, stop=True); time.sleep(.009)

gives

i2c device addresses [40]
Traceback (most recent call last):
  File "<stdin>", line 6, in <module>
TypeError: function doesn't take keyword arguments

Can someone explain what I'm doing wrong please?

[robert-hh]

The argument stop=True is rejected. It is not needed, since it's anyhow the default behavior.