is_ioinfo() - Code Metrics - Inspection of "Merge branch 'pathlib'" - ssato/python-anyconfig - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 6ef2f5...b75cb1 )

by Satoru

created 2018-06-02 19:22 UTC

is_ioinfo() B

↳ Parent: Project

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	5
c	1
b	0
f	0
dl	0
loc	20
rs	8.5454

#
# Copyright (C) 2012 - 2018 Satoru SATOH <ssato @ redhat.com>
# License: MIT
#
"""Misc utility routines for anyconfig module.
"""
from __future__ import absolute_import

import collections
import glob
import os.path
import types

import anyconfig.compat
import anyconfig.globals

from anyconfig.compat import pathlib


def get_file_extension(file_path):
    """
    >>> get_file_extension("/a/b/c")
    ''
    >>> get_file_extension("/a/b.txt")
    'txt'
    >>> get_file_extension("/a/b/c.tar.xz")
    'xz'
    """
    _ext = os.path.splitext(file_path)[-1]
    if _ext:
        return _ext[1:] if _ext.startswith('.') else _ext

    return ""


def sglob(files_pattern):
    """
    glob.glob alternative of which results sorted always.
    """
    return sorted(glob.glob(files_pattern))


def is_iterable(obj):
    """
    >>> is_iterable([])
    True
    >>> is_iterable(())
    True
    >>> is_iterable([x for x in range(10)])
    True
    >>> is_iterable((1, 2, 3))
    True
    >>> g = (x for x in range(10))
    >>> is_iterable(g)
    True
    >>> is_iterable("abc")
    False
    >>> is_iterable(0)
    False
    >>> is_iterable({})
    False
    """
    return isinstance(obj, (list, tuple, types.GeneratorType)) or \
        (not isinstance(obj, (int, str, dict)) and
         bool(getattr(obj, "next", False)))


def concat(xss):
    """
    Concatenates a list of lists.

    >>> concat([[]])
    []
    >>> concat((()))
    []
    >>> concat([[1,2,3],[4,5]])
    [1, 2, 3, 4, 5]
    >>> concat([[1,2,3],[4,5,[6,7]]])
    [1, 2, 3, 4, 5, [6, 7]]
    >>> concat(((1,2,3),(4,5,[6,7])))
    [1, 2, 3, 4, 5, [6, 7]]
    >>> concat(((1,2,3),(4,5,[6,7])))
    [1, 2, 3, 4, 5, [6, 7]]
    >>> concat((i, i*2) for i in range(3))
    [0, 0, 1, 2, 2, 4]
    """
    return list(anyconfig.compat.from_iterable(xs for xs in xss))


def normpath(path):
    """Normalize path.

    - eliminating double slashes, etc. (os.path.normpath)
    - ensure paths contain ~[user]/ expanded.

    :param path: Path string :: str
    """
    return os.path.normpath(os.path.expanduser(path) if '~' in path else path)


def is_path(obj):
    """
    Is given object `obj` a file path?

    :param obj: file path or something
    :return: True if `obj` is a file path
    """
    return isinstance(obj, anyconfig.compat.STR_TYPES)


def is_path_obj(obj):
    """Is given object `input` a pathlib.Path object?

    :param obj: a pathlib.Path object or something
    :return: True if `obj` is a pathlib.Path object

    >>> from anyconfig.compat import pathlib
    >>> if pathlib is not None:
    ...      obj = pathlib.Path(__file__)
    ...      assert is_path_obj(obj)
    >>>
    >>> assert not is_path_obj(__file__)
    """
    return pathlib is not None and isinstance(obj, pathlib.Path)


def is_file_stream(obj):
    """Is given object `input` a file stream (file/file-like object)?

    :param obj: a file / file-like (stream) object or something
    :return: True if `obj` is a file stream

    >>> assert is_file_stream(open(__file__))
    >>> assert not is_file_stream(__file__)
    """
    return getattr(obj, "read", False)


def is_ioinfo(obj, keys=None):
    """
    :return: True if given `obj` is a 'IOInfo' namedtuple object.

    >>> assert not is_ioinfo(1)
    >>> assert not is_ioinfo("aaa")
    >>> assert not is_ioinfo({})
    >>> assert not is_ioinfo(('a', 1, {}))

    >>> inp = anyconfig.globals.IOInfo("/etc/hosts", "path", "/etc/hosts",
    ...                                None, open)
    >>> assert is_ioinfo(inp)
    """
    if keys is None:
        keys = anyconfig.globals.IOI_KEYS

    if isinstance(obj, tuple) and getattr(obj, "_asdict", False):
        return all(k in obj._asdict() for k in keys)

    return False


def is_stream_ioinfo(obj):
    """
    :param obj: IOInfo object or something
    :return: True if given IOInfo object `obj` is of file / file-like object

    >>> ioi = anyconfig.globals.IOInfo(None, anyconfig.globals.IOI_STREAM,
    ...                                None, None, None)
    >>> assert is_stream_ioinfo(ioi)
    >>> assert not is_stream_ioinfo(__file__)
    """
    return getattr(obj, "type", None) == anyconfig.globals.IOI_STREAM


def is_path_like_object(obj, marker='*'):
    """
    Is given object `obj` a path string, a pathlib.Path, a file / file-like
    (stream) or IOInfo namedtuple object?

    :param obj:
        a path string, pathlib.Path object, a file / file-like or 'IOInfo'
        object

    :return:
        True if `obj` is a path string or a pathlib.Path object or a file
        (stream) object

    >>> assert is_path_like_object(__file__)
    >>> assert not is_path_like_object("/a/b/c/*.json", '*')

    >>> from anyconfig.compat import pathlib
    >>> if pathlib is not None:
    ...      assert is_path_like_object(pathlib.Path("a.ini"))
    ...      assert not is_path_like_object(pathlib.Path("x.ini"), 'x')

    >>> assert is_path_like_object(open(__file__))
    """
    return ((is_path(obj) and marker not in obj) or
            (is_path_obj(obj) and marker not in obj.as_posix()) or
            is_file_stream(obj) or is_ioinfo(obj))


def is_paths(maybe_paths, marker='*'):
    """
    Does given object `maybe_paths` consist of path or path pattern strings?
    """
    return ((is_path(maybe_paths) and marker in maybe_paths) or  # Path str
            (is_path_obj(maybe_paths) and marker in maybe_paths.as_posix()) or
            (is_iterable(maybe_paths) and
             all(is_path(p) or is_ioinfo(p) for p in maybe_paths)))


def get_path_from_stream(strm):
    """
    Try to get file path from given file or file-like object `strm`.

    :param strm: A file or file-like object
    :return: Path of given file or file-like object or None
    :raises: ValueError

    >>> assert __file__ == get_path_from_stream(open(__file__, 'r'))
    >>> assert get_path_from_stream(anyconfig.compat.StringIO()) is None
    >>> get_path_from_stream(__file__)  # doctest: +ELLIPSIS
    Traceback (most recent call last):
        ...
    ValueError: ...
    """
    if not is_file_stream(strm):
        raise ValueError("Given object does not look a file/file-like "
                         "object: %r" % strm)

    path = getattr(strm, "name", None)
    if path is not None:
        return normpath(path)

    return None


def _try_to_get_extension(obj):
    """
    Try to get file extension from given path or file object.

    :param obj: a file, file-like object or something
    :return: File extension or None

    >>> _try_to_get_extension("a.py")
    'py'
    """
    if is_path(obj):
        path = obj

    elif is_path_obj(obj):
        return obj.suffix[1:]

    elif is_file_stream(obj):
        try:
            path = get_path_from_stream(obj)
        except ValueError:
            return None

    elif is_ioinfo(obj):
        path = obj.path

    else:
        return None

    if path:
        return get_file_extension(path)

    return None


def are_same_file_types(objs):
    """
    Are given (maybe) file objs same type (extension) ?

    :param objs: A list of file path or file(-like) objects

    >>> are_same_file_types([])
    False
    >>> are_same_file_types(["a.conf"])
    True
    >>> are_same_file_types(["a.conf", "b.conf"])
    True
    >>> are_same_file_types(["a.yml", "b.yml"])
    True
    >>> are_same_file_types(["a.yml", "b.json"])
    False
    >>> strm = anyconfig.compat.StringIO()
    >>> are_same_file_types(["a.yml", "b.yml", strm])
    False
    """
    if not objs:
        return False

    ext = _try_to_get_extension(objs[0])
    if ext is None:
        return False

    return all(_try_to_get_extension(p) == ext for p in objs[1:])


def _expand_paths_itr(paths, marker='*'):
    """Iterator version of :func:`expand_paths`.
    """
    for path in paths:
        if is_path(path):
            if marker in path:  # glob path pattern
                for ppath in sglob(path):
                    yield ppath
            else:
                yield path  # a simple file path
        elif is_path_obj(path):
            if marker in path.as_posix():
                for ppath in sglob(path.as_posix()):
                    yield normpath(ppath)
            else:
                yield normpath(path.as_posix())
        elif is_ioinfo(path):
            yield path.path
        else:  # A file or file-like object
            yield path


def expand_paths(paths, marker='*'):
    """
    :param paths:
        A glob path pattern string or pathlib.Path object holding such path, or
        a list consists of path strings or glob path pattern strings or
        pathlib.Path object holding such ones, or file objects
    :param marker: Glob marker character or string, e.g. '*'

    :return: List of path strings

    >>> expand_paths([])
    []
    >>> expand_paths("/usr/lib/a/b.conf /etc/a/b.conf /run/a/b.conf".split())
    ['/usr/lib/a/b.conf', '/etc/a/b.conf', '/run/a/b.conf']
    >>> paths_s = os.path.join(os.path.dirname(__file__), "u*.py")
    >>> ref = sglob(paths_s)
    >>> assert expand_paths(paths_s) == ref
    >>> ref = ["/etc/a.conf"] + ref
    >>> assert expand_paths(["/etc/a.conf", paths_s]) == ref
    >>> strm = anyconfig.compat.StringIO()
    >>> assert expand_paths(["/etc/a.conf", strm]) == ["/etc/a.conf", strm]
    """
    if is_path(paths) and marker in paths:
        return sglob(paths)

    if is_path_obj(paths) and marker in paths.as_posix():
        # TBD: Is it better to return [p :: pathlib.Path] instead?
        return [normpath(p) for p in sglob(paths.as_posix())]

    return list(_expand_paths_itr(paths, marker=marker))


# pylint: disable=unused-argument
def noop(val, *args, **kwargs):
    """A function does nothing.

    >>> noop(1)
    1
    """
    # It means nothing but can suppress 'Unused argument' pylint warns.
    # (val, args, kwargs)[0]
    return val


_LIST_LIKE_TYPES = (collections.Iterable, collections.Sequence)


def is_dict_like(obj):
    """
    :param obj: Any object behaves like a dict.

    >>> is_dict_like("a string")
    False
    >>> is_dict_like({})
    True
    >>> is_dict_like(anyconfig.compat.OrderedDict((('a', 1), ('b', 2))))
    True
    """
    return isinstance(obj, (dict, collections.Mapping))  # any others?


def is_namedtuple(obj):
    """
    >>> p0 = collections.namedtuple("Point", "x y")(1, 2)
    >>> is_namedtuple(p0)
    True
    >>> is_namedtuple(tuple(p0))
    False
    """
    return isinstance(obj, tuple) and hasattr(obj, "_asdict")


def is_list_like(obj):
    """
    >>> is_list_like([])
    True
    >>> is_list_like(())
    True
    >>> is_list_like([x for x in range(10)])
    True
    >>> is_list_like((1, 2, 3))
    True
    >>> g = (x for x in range(10))
    >>> is_list_like(g)
    True
    >>> is_list_like("abc")
    False
    >>> is_list_like(0)
    False
    >>> is_list_like({})
    False
    """
    return isinstance(obj, _LIST_LIKE_TYPES) and \
        not (isinstance(obj, anyconfig.compat.STR_TYPES) or is_dict_like(obj))


def filter_options(keys, options):
    """
    Filter `options` with given `keys`.

    :param keys: key names of optional keyword arguments
    :param options: optional keyword arguments to filter with `keys`

    >>> filter_options(("aaa", ), dict(aaa=1, bbb=2))
    {'aaa': 1}
    >>> filter_options(("aaa", ), dict(bbb=2))
    {}
    """
    return dict((k, options[k]) for k in keys if k in options)

# vim:sw=4:ts=4:et:


1			#
2			# Copyright (C) 2012 - 2018 Satoru SATOH <ssato @ redhat.com>
3			# License: MIT
4			#
5			"""Misc utility routines for anyconfig module.
6			"""
7			from __future__ import absolute_import
8
9			import collections
10			import glob
11			import os.path
12			import types
13
14			import anyconfig.compat
15			import anyconfig.globals
16
17			from anyconfig.compat import pathlib
18
19
20			def get_file_extension(file_path):
21			"""
22			>>> get_file_extension("/a/b/c")
23			''
24			>>> get_file_extension("/a/b.txt")
25			'txt'
26			>>> get_file_extension("/a/b/c.tar.xz")
27			'xz'
28			"""
29			_ext = os.path.splitext(file_path)[-1]
30			if _ext:
31			return _ext[1:] if _ext.startswith('.') else _ext
32
33			return ""
34
35
36			def sglob(files_pattern):
37			"""
38			glob.glob alternative of which results sorted always.
39			"""
40			return sorted(glob.glob(files_pattern))
41
42
43			def is_iterable(obj):
44			"""
45			>>> is_iterable([])
46			True
47			>>> is_iterable(())
48			True
49			>>> is_iterable([x for x in range(10)])
50			True
51			>>> is_iterable((1, 2, 3))
52			True
53			>>> g = (x for x in range(10))
54			>>> is_iterable(g)
55			True
56			>>> is_iterable("abc")
57			False
58			>>> is_iterable(0)
59			False
60			>>> is_iterable({})
61			False
62			"""
63			return isinstance(obj, (list, tuple, types.GeneratorType)) or \
64			(not isinstance(obj, (int, str, dict)) and
65			bool(getattr(obj, "next", False)))
66
67
68			def concat(xss):
69			"""
70			Concatenates a list of lists.
71
72			>>> concat([[]])
73			[]
74			>>> concat((()))
75			[]
76			>>> concat([[1,2,3],[4,5]])
77			[1, 2, 3, 4, 5]
78			>>> concat([[1,2,3],[4,5,[6,7]]])
79			[1, 2, 3, 4, 5, [6, 7]]
80			>>> concat(((1,2,3),(4,5,[6,7])))
81			[1, 2, 3, 4, 5, [6, 7]]
82			>>> concat(((1,2,3),(4,5,[6,7])))
83			[1, 2, 3, 4, 5, [6, 7]]
84			>>> concat((i, i*2) for i in range(3))
85			[0, 0, 1, 2, 2, 4]
86			"""
87			return list(anyconfig.compat.from_iterable(xs for xs in xss))
88
89
90			def normpath(path):
91			"""Normalize path.
92
93			- eliminating double slashes, etc. (os.path.normpath)
94			- ensure paths contain ~[user]/ expanded.
95
96			:param path: Path string :: str
97			"""
98			return os.path.normpath(os.path.expanduser(path) if '~' in path else path)
99
100
101			def is_path(obj):
102			"""
103			Is given object `obj` a file path?
104
105			:param obj: file path or something
106			:return: True if `obj` is a file path
107			"""
108			return isinstance(obj, anyconfig.compat.STR_TYPES)
109
110
111			def is_path_obj(obj):
112			"""Is given object `input` a pathlib.Path object?
113
114			:param obj: a pathlib.Path object or something
115			:return: True if `obj` is a pathlib.Path object
116
117			>>> from anyconfig.compat import pathlib
118			>>> if pathlib is not None:
119			... obj = pathlib.Path(__file__)
120			... assert is_path_obj(obj)
121			>>>
122			>>> assert not is_path_obj(__file__)
123			"""
124			return pathlib is not None and isinstance(obj, pathlib.Path)
125
126
127			def is_file_stream(obj):
128			"""Is given object `input` a file stream (file/file-like object)?
129
130			:param obj: a file / file-like (stream) object or something
131			:return: True if `obj` is a file stream
132
133			>>> assert is_file_stream(open(__file__))
134			>>> assert not is_file_stream(__file__)
135			"""
136			return getattr(obj, "read", False)
137
138
139			def is_ioinfo(obj, keys=None):
140			"""
141			:return: True if given `obj` is a 'IOInfo' namedtuple object.
142
143			>>> assert not is_ioinfo(1)
144			>>> assert not is_ioinfo("aaa")
145			>>> assert not is_ioinfo({})
146			>>> assert not is_ioinfo(('a', 1, {}))
147
148			>>> inp = anyconfig.globals.IOInfo("/etc/hosts", "path", "/etc/hosts",
149			... None, open)
150			>>> assert is_ioinfo(inp)
151			"""
152			if keys is None:
153			keys = anyconfig.globals.IOI_KEYS
154
155			if isinstance(obj, tuple) and getattr(obj, "_asdict", False):
156			return all(k in obj._asdict() for k in keys)
157
158			return False
159
160
161			def is_stream_ioinfo(obj):
162			"""
163			:param obj: IOInfo object or something
164			:return: True if given IOInfo object `obj` is of file / file-like object
165
166			>>> ioi = anyconfig.globals.IOInfo(None, anyconfig.globals.IOI_STREAM,
167			... None, None, None)
168			>>> assert is_stream_ioinfo(ioi)
169			>>> assert not is_stream_ioinfo(__file__)
170			"""
171			return getattr(obj, "type", None) == anyconfig.globals.IOI_STREAM
172
173
174			def is_path_like_object(obj, marker='*'):
175			"""
176			Is given object `obj` a path string, a pathlib.Path, a file / file-like
177			(stream) or IOInfo namedtuple object?
178
179			:param obj:
180			a path string, pathlib.Path object, a file / file-like or 'IOInfo'
181			object
182
183			:return:
184			True if `obj` is a path string or a pathlib.Path object or a file
185			(stream) object
186
187			>>> assert is_path_like_object(__file__)
188			>>> assert not is_path_like_object("/a/b/c/.json", '')
189
190			>>> from anyconfig.compat import pathlib
191			>>> if pathlib is not None:
192			... assert is_path_like_object(pathlib.Path("a.ini"))
193			... assert not is_path_like_object(pathlib.Path("x.ini"), 'x')
194
195			>>> assert is_path_like_object(open(__file__))
196			"""
197			return ((is_path(obj) and marker not in obj) or
198			(is_path_obj(obj) and marker not in obj.as_posix()) or
199			is_file_stream(obj) or is_ioinfo(obj))
200
201
202			def is_paths(maybe_paths, marker='*'):
203			"""
204			Does given object `maybe_paths` consist of path or path pattern strings?
205			"""
206			return ((is_path(maybe_paths) and marker in maybe_paths) or # Path str
207			(is_path_obj(maybe_paths) and marker in maybe_paths.as_posix()) or
208			(is_iterable(maybe_paths) and
209			all(is_path(p) or is_ioinfo(p) for p in maybe_paths)))
210
211
212			def get_path_from_stream(strm):
213			"""
214			Try to get file path from given file or file-like object `strm`.
215
216			:param strm: A file or file-like object
217			:return: Path of given file or file-like object or None
218			:raises: ValueError
219
220			>>> assert __file__ == get_path_from_stream(open(__file__, 'r'))
221			>>> assert get_path_from_stream(anyconfig.compat.StringIO()) is None
222			>>> get_path_from_stream(__file__) # doctest: +ELLIPSIS
223			Traceback (most recent call last):
224			...
225			ValueError: ...
226			"""
227			if not is_file_stream(strm):
228			raise ValueError("Given object does not look a file/file-like "
229			"object: %r" % strm)
230
231			path = getattr(strm, "name", None)
232			if path is not None:
233			return normpath(path)
234
235			return None
236
237
238			def _try_to_get_extension(obj):
239			"""
240			Try to get file extension from given path or file object.
241
242			:param obj: a file, file-like object or something
243			:return: File extension or None
244
245			>>> _try_to_get_extension("a.py")
246			'py'
247			"""
248			if is_path(obj):
249			path = obj
250
251			elif is_path_obj(obj):
252			return obj.suffix[1:]
253
254			elif is_file_stream(obj):
255			try:
256			path = get_path_from_stream(obj)
257			except ValueError:
258			return None
259
260			elif is_ioinfo(obj):
261			path = obj.path
262
263			else:
264			return None
265
266			if path:
267			return get_file_extension(path)
268
269			return None
270
271
272			def are_same_file_types(objs):
273			"""
274			Are given (maybe) file objs same type (extension) ?
275
276			:param objs: A list of file path or file(-like) objects
277
278			>>> are_same_file_types([])
279			False
280			>>> are_same_file_types(["a.conf"])
281			True
282			>>> are_same_file_types(["a.conf", "b.conf"])
283			True
284			>>> are_same_file_types(["a.yml", "b.yml"])
285			True
286			>>> are_same_file_types(["a.yml", "b.json"])
287			False
288			>>> strm = anyconfig.compat.StringIO()
289			>>> are_same_file_types(["a.yml", "b.yml", strm])
290			False
291			"""
292			if not objs:
293			return False
294
295			ext = _try_to_get_extension(objs[0])
296			if ext is None:
297			return False
298
299			return all(_try_to_get_extension(p) == ext for p in objs[1:])
300
301
302			def _expand_paths_itr(paths, marker='*'):
303			"""Iterator version of :func:`expand_paths`.
304			"""
305			for path in paths:
306			if is_path(path):
307			if marker in path: # glob path pattern
308			for ppath in sglob(path):
309			yield ppath
310			else:
311			yield path # a simple file path
312			elif is_path_obj(path):
313			if marker in path.as_posix():
314			for ppath in sglob(path.as_posix()):
315			yield normpath(ppath)
316			else:
317			yield normpath(path.as_posix())
318			elif is_ioinfo(path):
319			yield path.path
320			else: # A file or file-like object
321			yield path
322
323
324			def expand_paths(paths, marker='*'):
325			"""
326			:param paths:
327			A glob path pattern string or pathlib.Path object holding such path, or
328			a list consists of path strings or glob path pattern strings or
329			pathlib.Path object holding such ones, or file objects
330			:param marker: Glob marker character or string, e.g. '*'
331
332			:return: List of path strings
333
334			>>> expand_paths([])
335			[]
336			>>> expand_paths("/usr/lib/a/b.conf /etc/a/b.conf /run/a/b.conf".split())
337			['/usr/lib/a/b.conf', '/etc/a/b.conf', '/run/a/b.conf']
338			>>> paths_s = os.path.join(os.path.dirname(__file__), "u*.py")
339			>>> ref = sglob(paths_s)
340			>>> assert expand_paths(paths_s) == ref
341			>>> ref = ["/etc/a.conf"] + ref
342			>>> assert expand_paths(["/etc/a.conf", paths_s]) == ref
343			>>> strm = anyconfig.compat.StringIO()
344			>>> assert expand_paths(["/etc/a.conf", strm]) == ["/etc/a.conf", strm]
345			"""
346			if is_path(paths) and marker in paths:
347			return sglob(paths)
348
349			if is_path_obj(paths) and marker in paths.as_posix():
350			# TBD: Is it better to return [p :: pathlib.Path] instead?
351			return [normpath(p) for p in sglob(paths.as_posix())]
352
353			return list(_expand_paths_itr(paths, marker=marker))
354
355
356			# pylint: disable=unused-argument
357			def noop(val, args, *kwargs):
358			"""A function does nothing.
359
360			>>> noop(1)
361			1
362			"""
363			# It means nothing but can suppress 'Unused argument' pylint warns.
364			# (val, args, kwargs)[0]
365			return val
366
367
368			_LIST_LIKE_TYPES = (collections.Iterable, collections.Sequence)
369
370
371			def is_dict_like(obj):
372			"""
373			:param obj: Any object behaves like a dict.
374
375			>>> is_dict_like("a string")
376			False
377			>>> is_dict_like({})
378			True
379			>>> is_dict_like(anyconfig.compat.OrderedDict((('a', 1), ('b', 2))))
380			True
381			"""
382			return isinstance(obj, (dict, collections.Mapping)) # any others?
383
384
385			def is_namedtuple(obj):
386			"""
387			>>> p0 = collections.namedtuple("Point", "x y")(1, 2)
388			>>> is_namedtuple(p0)
389			True
390			>>> is_namedtuple(tuple(p0))
391			False
392			"""
393			return isinstance(obj, tuple) and hasattr(obj, "_asdict")
394
395
396			def is_list_like(obj):
397			"""
398			>>> is_list_like([])
399			True
400			>>> is_list_like(())
401			True
402			>>> is_list_like([x for x in range(10)])
403			True
404			>>> is_list_like((1, 2, 3))
405			True
406			>>> g = (x for x in range(10))
407			>>> is_list_like(g)
408			True
409			>>> is_list_like("abc")
410			False
411			>>> is_list_like(0)
412			False
413			>>> is_list_like({})
414			False
415			"""
416			return isinstance(obj, _LIST_LIKE_TYPES) and \
417			not (isinstance(obj, anyconfig.compat.STR_TYPES) or is_dict_like(obj))
418
419
420			def filter_options(keys, options):
421			"""
422			Filter `options` with given `keys`.
423
424			:param keys: key names of optional keyword arguments
425			:param options: optional keyword arguments to filter with `keys`
426
427			>>> filter_options(("aaa", ), dict(aaa=1, bbb=2))
428			{'aaa': 1}
429			>>> filter_options(("aaa", ), dict(bbb=2))
430			{}
431			"""
432			return dict((k, options[k]) for k in keys if k in options)
433
434			# vim:sw=4:ts=4:et:
435

ssato / python-anyconfig

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