core/various: python3 compat, prepare for python2 -> python3

see https://review.gluster.org/#/c/19788/,
    https://review.gluster.org/#/c/19871/,
    https://review.gluster.org/#/c/19952/, and
    https://review.gluster.org/#/c/20104/

This patch changes uses of xrange() to range(), as suggested by the
python 2to3 utility. https://www.geeksforgeeks.org/range-vs-xrange-python/
In Python 3, there is no xrange , but the range function behaves like
xrange in Python 2. (My concern is that range() in python2 may behave
differently until we "throw the switch" to switch to python3.)

Note: Fedora packaging guidelines require explicit shebangs, so
popular practices like #!/usr/bin/env python and #!/usr/bin/python
are not allowed; they must be #!/usr/bin/python2 or #!/usr/bin/python3

Note: Selected small fixes from 2to3 utility. Specifically apply,
basestring, funcattrs, idioms, numliterals, set_literal, types, urllib,
and zip have already been applied. Also version agnostic imports for
urllib, cpickle, socketserver, _thread, queue, etc., suggested by
Aravinda in https://review.gluster.org/#/c/19767/1

Note: these 2to3 fixes report no changes are necessary: asserts, buffer,
exec, execfile, exitfunc, filter, getcwdu, intern, itertools, metaclass,
methodattrs, ne, next, nonzero, operator, paren, raw_input, reduce,
reload, renames, repr, standarderror, sys_exc, throw, tuple_params,
xreadlines.

Change-Id: I16ae9f4e3a4fd02a0623fb6f9fdb7aaf65f2a8a9
updates: #411
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>

0 files changed, 0 insertions, 0 deletions