/usr/share/pyshared/blockdiag/utils/myitertools.py is in python-blockdiag 1.3.2-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | # -*- coding: utf-8 -*-
# Copyright 2011 Takeshi KOMIYA
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from itertools import cycle
def istep(seq, step=2):
iterable = iter(seq)
while True:
yield [next(iterable) for _ in range(step)]
def stepslice(iterable, steps):
iterable = iter(iterable)
step = cycle(steps)
while True:
# skip (1)
n = next(step)
if n == 0:
pass
elif n == 1:
o = next(iterable)
yield o
yield o
else:
yield next(iterable)
for _ in range(n - 2):
next(iterable)
yield next(iterable)
# skip (2)
for _ in range(next(step)):
next(iterable)
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