def _extract(cls, truth, subcall, transform, iterable):
'''
collect members of things
@param call: "Truth" filter
@param truth: second "Truth" filter
@param iterable: an iterable
'''
def members():
f, s, t, i = truth, subcall, transform, iterable
d, w, g, e = dir, cls._extract, getattr, AttributeError
test = lambda x: x.startswith('__') or x.startswith('mro')
for k in filterfalse(test, d(i)):
try:
v = g(i, k)
except e:
pass
else:
if s(v):
yield k, t(w(f, s, t, v))
else:
yield k, v
for member in ifilter(
truth, members(),
):
yield member
def partition(self):
'''
split incoming things into `True` and `False` things based on results
of call
'''
list_, call_ = list, self._call
with self._context():
falsy, truey = tee(self._iterable)
return self._xtend(iter([
list_(filterfalse(call_, falsy)), list_(ifilter(call_, truey)),
]))
def _mfilter(cls, call, iterable):
'''
filter members of things
@param call: "Truth" filter
@param iterable: an iterable
'''
def members(): #@IgnorePep8
itrbl, get_, AttributeError_ = iterable, getattr, AttributeError
test = lambda x: x.startswith('__') or x.startswith('mro')
for key in filterfalse(test, dir(iterable)):
try:
thing = get_(itrbl, key)
except AttributeError_:
pass
else:
yield key, thing
for i in ifilter(call, members()):
yield i
def find(self):
'''first incoming thing for which call is `True`'''
with self._context():
return self._append(
next(ifilter(self._call, self._iterable))
)
def filter(self):
'''incoming things for which call is `True`'''
with self._context():
return self._xtend(ifilter(self._call, self._iterable))
def compact(self):
'''strip "untrue" things from incoming things'''
with self._context():
return self._iter(ifilter(truth, self._iterable))
