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Copy pathIteratorTools.py
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46 lines (35 loc) · 1.66 KB
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####################################################################################################
#
# CodeReview - A Code Review GUI
# Copyright (C) 2015 Fabrice Salvaire
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
####################################################################################################
"""This modules provides iterator tools."""
####################################################################################################
def pairwise(iterable):
"""Return a generator which generate a pair wise list from an iterable: s -> (s[0],s[1]),
(s[1],s[2]), ... (s[N-1], s[N]).
"""
prev = iterable[0]
for x in iterable[1:]:
yield prev, x
prev = x
####################################################################################################
def iter_with_last_flag(iterable):
"""Iterate over an iterable and yield a 2-tuple containing the current item and a Boolean
indicating if it is the last item.
"""
last_index = len(iterable) -1
for i, x in enumerate(iterable):
yield x, i == last_index