Objc: module object has no attribute 'setSignatureForSelector'

[roechi]

Hi, I am new to this and trying to figure out the following problem:

Running nxt_test (or any other script for that matter) results in the following error. Apparently there is an issue with pyobjc. Im running Python 2.7.12 and lightblue 0.4 on OSX 10.12.

Error while running test:
File "nxt_test", line 25, in
b = nxt.locator.find_one_brick(debug=debug)
File "/usr/local/lib/python2.7/site-packages/nxt/locator.py", line 112, in find_one_brick
for s in find_bricks(host, name, silent, method):
File "/usr/local/lib/python2.7/site-packages/nxt/locator.py", line 51, in find_bricks
import bluesock
File "/usr/local/lib/python2.7/site-packages/nxt/bluesock.py", line 18, in
import lightblueglue as bluetooth
File "/usr/local/lib/python2.7/site-packages/nxt/lightblueglue.py", line 17, in
import lightblue
File "/usr/local/lib/python2.7/site-packages/lightblue/init.py", line 160, in
from _lightblue import *
File "/usr/local/lib/python2.7/site-packages/lightblue/_lightblue.py", line 27, in
import _IOBluetooth
File "/usr/local/lib/python2.7/site-packages/lightblue/_IOBluetooth.py", line 61, in
objc.setSignatureForSelector("IOBluetoothSDPServiceRecord",
'module' object has no attribute 'setSignatureForSelector'

Thanks for any help.

[tcwan]

There were some Bluetooth driver changes in MacOS since 10.8, which results in the error you see.
I think there's no solution for using lightblue on MacOS 10.12 unless there are newer patches available.
Take a look at my comments in #95

[dlech]

Bluetooth on macOS should be fixed by #147. You will need to create a config file such as this:

[Brick]
name = NXT
host = 00:16:53:00:00:00
strict = 0
method = usb=True, bluetooth=False, device=True

This will tell nxt-python to use the Bluetooth serial port created by macOS automatically (this is what device=True is for). No python bluetooth packages required.