Well, I have solved the issue of "mult=self.units.strip()+' '[0]: TypeError: can't concat bytes to int". It needs parentheses, which the original code had. Now the code runs, but, alas, now it does not report the readings from the meter. Since I really do not understand object-oriented python, I am at a loss. It seems to me that this format is inadequate and inappropriate for schooling a coding novice on such things, so I will see what I help I can get in person. Thanks for all who have had to suffer through this.
-Denis On Sun, Jan 14, 2018 at 6:30 PM, Denis Heidtmann <denis.heidtm...@gmail.com> wrote: > Last discussion on this issue I mentioned a python program I found. I > have since put the program in Spyder using Python3. I had to make a number > of changes to accommodate the change to 3. The latest is that I see that > the readings are available to the program although parsing the data is > running into difficulty associated, I believe, with Python3's fussiness > with bytes, strings, etc. (The data I see is via some print statements > stuck in the code.) > > line 72: originally it had > > mult=self.units.strip()+' '[0] > TypeError: can't concat bytes to int > > I tried: > mult=self.units.strip()+' '.encode()[0] > > and > mult=self.units.strip()+b' '[0] > > to no avail. > > Note: > data = b'DC -0.000 V\r' > type data = <class 'bytes'> > 01234567890123456789 > type units = <class 'bytes'> > > But the good news is that when I changed the reading on the meter the > value in data changed accordingly. So I see the issue now as one of > knowing how to fix the Python so that it parses the data correctly, rather > than an issue of how to communicate with the dmm. > > BTW, I see no way to change the manufacture's sw running under Windows to > look at the usb, which is what I need to test the usb interface under > Windows. I will explore the usb using Linux, which is the ultimate goal. > > _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
