[beagleboard] Re: libpruio (fast and easy D/A - I/O)

[Andrew Harres]

I'm not sure about the differences between importing in python 2 vs 3. I'll 
look into it more. I did try running python3 interactively in the libpruio 
directory and tried an import directly.

debian@beaglebone:~/src/pruio_examples/libpruio$ ls
__init__.py   __pycache__      ctypesloader.pyc  pruio.pyc
__init__.pyc  ctypesloader.py  pruio.py
debian@beaglebone:~/src/pruio_examples/libpruio$ python3
Python 3.5.3 (default, Jul  9 2020, 13:00:10)
[GCC 6.3.0 20170516] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pruio
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/debian/src/pruio_examples/libpruio/pruio.py", line 3, in 
<module>
    from ctypesloader import *
  File "/home/debian/src/pruio_examples/libpruio/ctypesloader.py", line 375
    except OSError,e:
                  ^
SyntaxError: invalid syntax

I think that line should read "except OSError as e:" to be valid python 3. 
I changed that and got another error.

debian@beaglebone:~/src/pruio_examples/libpruio$ vim ctypesloader.py
debian@beaglebone:~/src/pruio_examples/libpruio$ python3
Python 3.5.3 (default, Jul  9 2020, 13:00:10)
[GCC 6.3.0 20170516] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pruio
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/debian/src/pruio_examples/libpruio/pruio.py", line 3, in 
<module>
    from ctypesloader import *
  File "/home/debian/src/pruio_examples/libpruio/ctypesloader.py", line 48, 
in <module>
    class UserString:
  File "/home/debian/src/pruio_examples/libpruio/ctypesloader.py", line 
100, in UserString
    def count(self, sub, start=0, end=sys.maxint):
AttributeError: module 'sys' has no attribute 'maxint'

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