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Edit: /opt/alt/python27/lib/python2.7/site-packages/zipp.py

# coding: utf-8

from __future__ import division

import io
import sys
import posixpath
import zipfile
import functools
import itertools
from collections import OrderedDict

try:
    from contextlib import suppress
except ImportError:
    from contextlib2 import suppress

__metaclass__ = type

def _parents(path):
    """
    Given a path with elements separated by
    posixpath.sep, generate all parents of that path.

>>> list(_parents('b/d'))
    ['b']
    >>> list(_parents('/b/d/'))
    ['/b']
    >>> list(_parents('b/d/f/'))
    ['b/d', 'b']
    >>> list(_parents('b'))
    []
    >>> list(_parents(''))
    []
    """
    return itertools.islice(_ancestry(path), 1, None)

def _ancestry(path):
    """
    Given a path with elements separated by
    posixpath.sep, generate all elements of that path

>>> list(_ancestry('b/d'))
    ['b/d', 'b']
    >>> list(_ancestry('/b/d/'))
    ['/b/d', '/b']
    >>> list(_ancestry('b/d/f/'))
    ['b/d/f', 'b/d', 'b']
    >>> list(_ancestry('b'))
    ['b']
    >>> list(_ancestry(''))
    []
    """
    path = path.rstrip(posixpath.sep)
    while path and path != posixpath.sep:
        yield path
        path, tail = posixpath.split(path)

class CompleteDirs(zipfile.ZipFile):
    """
    A ZipFile subclass that ensures that implied directories
    are always included in the namelist.
    """

@staticmethod
    def _implied_dirs(names):
        parents = itertools.chain.from_iterable(map(_parents, names))
        # Cast names to a set for O(1) lookups
        existing = set(names)
        # Deduplicate entries in original order
        implied_dirs = OrderedDict.fromkeys(
            p + posixpath.sep for p in parents
            if p + posixpath.sep not in existing
        )
        return implied_dirs

def namelist(self):
        names = super(CompleteDirs, self).namelist()
        return names + list(self._implied_dirs(names))

def _name_set(self):
        return set(self.namelist())

def resolve_dir(self, name):
        """
        If the name represents a directory, return that name
        as a directory (with the trailing slash).
        """
        names = self._name_set()
        dirname = name + '/'
        dir_match = name not in names and dirname in names
        return dirname if dir_match else name

@classmethod
    def make(cls, source):
        """
        Given a source (filename or zipfile), return an
        appropriate CompleteDirs subclass.
        """
        if isinstance(source, CompleteDirs):
            return source

if not isinstance(source, zipfile.ZipFile):
            return cls(_pathlib_compat(source))

# Only allow for FastPath when supplied zipfile is read-only
        if 'r' not in source.mode:
            cls = CompleteDirs

res = cls.__new__(cls)
        vars(res).update(vars(source))
        return res

class FastLookup(CompleteDirs):
    """
    ZipFile subclass to ensure implicit
    dirs exist and are resolved rapidly.
    """
    def namelist(self):
        with suppress(AttributeError):
            return self.__names
        self.__names = super(FastLookup, self).namelist()
        return self.__names

def _name_set(self):
        with suppress(AttributeError):
            return self.__lookup
        self.__lookup = super(FastLookup, self)._name_set()
        return self.__lookup

def _pathlib_compat(path):
    """
    For path-like objects, convert to a filename for compatibility
    on Python 3.6.1 and earlier.
    """
    try:
        return path.__fspath__()
    except AttributeError:
        return str(path)

class Path:
    """
    A pathlib-compatible interface for zip files.

Consider a zip file with this structure::

.
        ├── a.txt
        └── b
            ├── c.txt
            └── d
                └── e.txt

>>> data = io.BytesIO()
    >>> zf = zipfile.ZipFile(data, 'w')
    >>> zf.writestr('a.txt', 'content of a')
    >>> zf.writestr('b/c.txt', 'content of c')
    >>> zf.writestr('b/d/e.txt', 'content of e')
    >>> zf.filename = 'abcde.zip'

Path accepts the zipfile object itself or a filename

>>> root = Path(zf)

From there, several path operations are available.

Directory iteration (including the zip file itself):

>>> a, b = root.iterdir()
    >>> a
    Path('abcde.zip', 'a.txt')
    >>> b
    Path('abcde.zip', 'b/')

name property:

>>> b.name
    'b'

join with divide operator:

>>> c = b / 'c.txt'
    >>> c
    Path('abcde.zip', 'b/c.txt')
    >>> c.name
    'c.txt'

Read text:

>>> c.read_text()
    'content of c'

existence:

>>> c.exists()
    True
    >>> (b / 'missing.txt').exists()
    False

Coercion to string:

>>> str(c)
    'abcde.zip/b/c.txt'
    """

__repr = "{self.__class__.__name__}({self.root.filename!r}, {self.at!r})"

def __init__(self, root, at=""):
        self.root = FastLookup.make(root)
        self.at = at

def open(self, mode='r', *args, **kwargs):
        """
        Open this entry as text or binary following the semantics
        of ``pathlib.Path.open()`` by passing arguments through
        to io.TextIOWrapper().
        """
        pwd = kwargs.pop('pwd', None)
        zip_mode = mode[0]
        stream = self.root.open(self.at, zip_mode, pwd=pwd)
        if 'b' in mode:
            if args or kwargs:
                raise ValueError("encoding args invalid for binary operation")
            return stream
        return io.TextIOWrapper(stream, *args, **kwargs)

@property
    def name(self):
        return posixpath.basename(self.at.rstrip("/"))

def read_text(self, *args, **kwargs):
        with self.open('r', *args, **kwargs) as strm:
            return strm.read()

def read_bytes(self):
        with self.open('rb') as strm:
            return strm.read()

def _is_child(self, path):
        return posixpath.dirname(path.at.rstrip("/")) == self.at.rstrip("/")

def _next(self, at):
        return Path(self.root, at)

def is_dir(self):
        return not self.at or self.at.endswith("/")

def is_file(self):
        return not self.is_dir()

def exists(self):
        return self.at in self.root._name_set()

def iterdir(self):
        if not self.is_dir():
            raise ValueError("Can't listdir a file")
        subs = map(self._next, self.root.namelist())
        return filter(self._is_child, subs)

def __str__(self):
        return posixpath.join(self.root.filename, self.at)

def __repr__(self):
        return self.__repr.format(self=self)

def joinpath(self, add):
        next = posixpath.join(self.at, _pathlib_compat(add))
        return self._next(self.root.resolve_dir(next))

__truediv__ = joinpath

@property
    def parent(self):
        parent_at = posixpath.dirname(self.at.rstrip('/'))
        if parent_at:
            parent_at += '/'
        return self._next(parent_at)

if sys.version_info < (3,):
        __div__ = __truediv__

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