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# Copyright (C) 2017 Bazaar hackers
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""
Module to aid writing a Python dialect compatible with 2.7 and 3.4+.
Initially pretty much just a subset of six while things get worked out.
"""
from __future__ import absolute_import
from six import (
binary_type,
get_unbound_function,
indexbytes,
int2byte,
PY3,
reraise,
string_types,
text_type,
unichr,
viewitems,
viewkeys,
viewvalues,
)
# The io module exists in Python 2.7 but lacks optimisation. Most uses are not
# performance critical, but want to measure before switching from cStringIO.
if PY3:
import io as _io
BytesIO = _io.BytesIO
StringIO = _io.StringIO
from builtins import range, map, zip
else:
from cStringIO import StringIO as BytesIO
from StringIO import StringIO
from future_builtins import zip, map
range = xrange
# GZ 2017-06-10: Work out if interning bits of inventory is behaviour we want
# to retain outside of StaticTuple, if so need to implement for Python 3.
if PY3:
def bytesintern(b):
"""Dummy intern() function."""
return b
else:
bytesintern = intern
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