Chip Wachob wrote: > Cameron, > > Thank you again for the insight. > > Yes, data_out is an equivalently-sized 'chunk' of a larger array. > > I'm 'getting' this now.. > > So, without all the fluff associated with wiggling lines, my function > now looks like this: > > def RSI_size_the_loop(): > results = [] > all_together = [] # not certain if I need this, put it in in an > attempt to fix the incompatibility if it existed > > for x in range (0, MAX_LOOP_COUNT, slice_size): > results.append(my_transfer(disp, data_out, slice_size) > > print " results ", x, " = ", results # show how results grows > on each iteration > > all_together = bytearray().join(results) > > print " all together ", all_together > > > I can observe results increasing in size and the last time through the > loop: > > results 48 = > [[bytearray(b'\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')],
Note that there are two '[' at the start of the list. This means that the first list item is another list. In fact you seem to have a list of single item lists like [["foo"], ["bar"], ...] when you need ["foo", "bar", ...] Of course join will fail with that: >>> "".join(["foo", "bar"]) 'foobar' >>> "".join([["foo"], ["bar"]]) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: sequence item 0: expected string, list found I think the error message is pretty clear ;) Have a look into your my_transfer() function to find out why it returns a list (or show us the code). _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
