Unable to read port and bus number about temper-python HOT 3 CLOSED

Same here. I am on CentOS 6. I found no python-usb package from my yum repositories, so I installed pyusb from source (SourceForge). But this did not affect the error I get when I try to run temper-poll.

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I have the same problem using temperusb 1.1.2 installed from PyPi. An old version (0.2) discovers devices fine but using 1.1.2 I get the ValueError above.

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This issue is caused by line 38 in temper.py:

37  bus_id = int(bus.dirname)

bus is a parameter to TemperDevice(). It is generated like this:

156         busses = usb.busses()
157         self._devices = []
158         for bus in busses:
159             self._devices.extend([TemperDevice(x, bus) for x in bus.devices if (x.idVendor,x.idProduct) in VIDPIDs])

However on the linux distros that I've tested (CentOS 6.x, Ubunto 13.04, Debian Wheezy) the values returned by the generator usb.busses() look like this:

{'dirname': '', 'location': 0, 'devices': [<usb.legacy.Device object at 0xb664a68c>, <usb.legacy.Device object at 0xb664a70c>, <usb.legacy.Device object at 0xb664a76c>, <usb.legacy.Device object at 0xb664a7cc>]}
{'dirname': '', 'location': 0, 'devices': [<usb.legacy.Device object at 0xb663fd6c>]}
{'dirname': '', 'location': 0, 'devices': [<usb.legacy.Device object at 0xb663f94c>]}

Notice that dirname is an empty string? So as far as I can see, this will always throw a ValueError when cast to an int.

I'm not sure why the bus object need be passed as a parameter to TemperDevice() at all. The device object being passed already contains a bus member which is apparently an integer defining the bus number.

The TemperDevice() class also defines a get_bus() method which is never actually called.

All of this was part of PR #2 in an attempt to identify individual devices for calibration purposes. I'll take a look and see if I can't get this tidied up and working again.

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