Read unsigned byte from the specified register I2C

[iber]

I'm trying to translate a Python library for the SI1145 into a microPython library.
Things were going good until I had to translate this line
paramVal = self._device.readU8(SI1145_REG_PARAMRD)

according to the documentation the readU8 command reads an unsigned byte from the specified register.
I tried to translate this to
paramVal = self._device.readfrom_mem(self._address, SI1145_REG_PARAMRD, 1)
which results in a
TypeError: unsupported types for : 'bytes', 'bytes'

I'm not sure if the problem is with the translation I made since I don't really understand what the error means.

You can find the original python library here

The code I came up with so far:

0_1515759338877_SI1145.py

[iber]

Never mind I found the problem.
It was actually in the line above
paramVal = self._device.readfrom_mem(self._address, SI1145_REG_PARAMRD, 1)