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Filename: //lib/python3/dist-packages/zipp.py
# coding: utf-8 from __future__ import division import io import sys import posixpath import zipfile import functools import itertools import more_itertools __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 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 = ( root if isinstance(root, zipfile.ZipFile) else zipfile.ZipFile(self._pathlib_compat(root)) ) self.at = at @staticmethod 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) @property def open(self): return functools.partial(self.root.open, self.at) @property def name(self): return posixpath.basename(self.at.rstrip("/")) def read_text(self, *args, **kwargs): with self.open() as strm: return io.TextIOWrapper(strm, *args, **kwargs).read() def read_bytes(self): with self.open() 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._names() def iterdir(self): if not self.is_dir(): raise ValueError("Can't listdir a file") subs = map(self._next, self._names()) 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): add = self._pathlib_compat(add) next = posixpath.join(self.at, add) next_dir = posixpath.join(self.at, add, "") names = self._names() return self._next(next_dir if next not in names and next_dir in names else next) __truediv__ = joinpath @staticmethod def _implied_dirs(names): return more_itertools.unique_everseen( parent + "/" for name in names for parent in _parents(name) if parent + "/" not in names ) @classmethod def _add_implied_dirs(cls, names): return names + list(cls._implied_dirs(names)) @property def parent(self): parent_at = posixpath.dirname(self.at.rstrip('/')) if parent_at: parent_at += '/' return self._next(parent_at) def _names(self): return self._add_implied_dirs(self.root.namelist()) if sys.version_info < (3,): __div__ = __truediv__
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