Suggestion: Make pynorm work with Python3

[honglei]

As https://www.python.org/doc/sunset-python-2/ , hope for supporting python3

[honglei]

function cmp in session.py/object.py map in logparser.py should be replaced in Python3.

Try python-future

[bebopagogo]

@honglei - I will investigate your suggestions here. On my system, the current pynorm code from the GitHub repo is working with Python 3.8. I committed some updates a few weeks ago that seem to address that. I understand that the cmp function is deprecated. I need to look at the logparser code separately.

[honglei]

"On average, the share of Python 2 users decreases by 5 percentage points each year, and now only 5 developers out of 100 use it." https://lp.jetbrains.com/python-developers-survey-2021/#PythonVersions https://www.python.org/doc/sunset-python-2/