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# filter.py
# Copyright 2006, 2007 by Bernhard Lohkamp
# Copyright 2006, 2007 by Paul Emsley, The University of York
#
# 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/>.
# Basic python function, filter the objects in list ls by function
# fn. e.g. filter(lambda x: not x%2, [0,1,2,3]) -> [0,2]
#
# BL says:: python has this function build in (now), so use python's
# version
#
def filter_coot(fn,ls):
ret_ls = []
if len(ls) > 0:
for i in range(len(ls)):
print(i, ls[i])
if fn(ls[i]):
print(i, ls[i])
ret_ls.append(ls[i])
else: pass
else:
ret_ls = ls
return ret_ls
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