33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
# Copyright (C) 2014-2015 Andrey Antukh <niwi@niwi.be>
|
|
# Copyright (C) 2014-2015 Jesús Espino <jespinog@gmail.com>
|
|
# Copyright (C) 2014-2015 David Barragán <bameda@dbarragan.com>
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
def first(iterable):
|
|
if len(iterable) == 0:
|
|
return None
|
|
return iterable[0]
|
|
|
|
|
|
def next(data:list):
|
|
return data[1:]
|
|
|
|
|
|
def arithmetic_progression(step=1, start=1):
|
|
i = start
|
|
while True:
|
|
yield i
|
|
i += step
|