/usr/lib/python2.7/dist-packages/picklable_itertools/filter.py is in python-picklable-itertools 0.1.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | from abc import ABCMeta, abstractmethod
import six
from .iter_dispatch import iter_
from .base import BaseItertool
@six.add_metaclass(ABCMeta)
class BaseFilter(BaseItertool):
def __init__(self, pred, seq):
self._predicate = pred
self._iter = iter_(seq)
@abstractmethod
def __next__(self):
pass
class ifilter(BaseFilter):
"""ifilter(function or None, iterable) --> ifilter object
Return an iterator yielding those items of iterable for which
function(item) is true. If function is None, return the items that are
true.
"""
def _keep(self, value):
predicate = bool if self._predicate is None else self._predicate
return predicate(value)
def __next__(self):
val = next(self._iter)
while not self._keep(val):
val = next(self._iter)
return val
class ifilterfalse(ifilter):
"""ifilterfalse(function or None, sequence) --> ifilterfalse object
Return those items of sequence for which function(item) is false.
If function is None, return the items that are false.
"""
def _keep(self, value):
return not super(ifilterfalse, self)._keep(value)
class takewhile(BaseFilter):
"""takewhile(predicate, iterable) --> takewhile object
Return successive entries from an iterable as long as the
predicate evaluates to true for each entry.
"""
def __next__(self):
value = next(self._iter)
if not self._predicate(value):
raise StopIteration
return value
class dropwhile(takewhile):
"""dropwhile(predicate, iterable) --> dropwhile object
Drop items from the iterable while predicate(item) is true.
Afterwards, return every element until the iterable is exhausted.
"""
def __next__(self):
value = next(self._iter)
while not getattr(self, '_started', False) and self._predicate(value):
value = next(self._iter)
self._started = True
return value
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