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opener = openers[suffix]
except KeyError:
raise UnknownArchive(suffix)
if options is None:
options = {}
if file is not None:
if mode in 'wa' and not hasattr(file, 'write'):
raise TypeError(""file.write() does not exist"", file)
if mode == 'r' and not hasattr(file, 'read'):
raise TypeError(""file.read() does not exist"", file)
if [filename, file].count(None) != 1:
raise ValueError(""either filename or file must be specified"")
if filename is not None:
file = builtins.open(filename, mode + 'b')
try:
return opener(file, mode, options)
except:
if filename is not None:
file.close()
raise"
529,"def extract(archive, directory, suffix=None, unpack_single_dir=False,
check_extract_file=None, progress_callback=None, default_mode='755'):
""""""
Extract the contents of *archive* to the specified *directory*. This
function ensures that no file is extracted outside of the target directory
(which can theoretically happen if the arcname is not relative or points
to a parent directory).
# Parameters
archive (str, archive-like): The filename of an archive or an already
opened archive.
directory (str): Path to the directory to unpack the contents to.
unpack_single_dir (bool): If this is True and if the archive contains only
a single top-level directory, its contents will be placed directly into
the target *directory*.
""""""
if isinstance(archive, str):
with open(archive, suffix=suffix) as archive:
return extract(archive, directory, None, unpack_single_dir,
check_extract_file, progress_callback, default_mode)
if isinstance(default_mode, str):
default_mode = int(default_mode, 8)
if progress_callback:
progress_callback(-1, 0, None)
names = archive.getnames()
# Find out if we have only one top-level directory.
toplevel_dirs = set()
for name in names:
parts = name.split('/')
if len(parts) > 1:
toplevel_dirs.add(parts[0])
if unpack_single_dir and len(toplevel_dirs) == 1:
stripdir = next(iter(toplevel_dirs)) + '/'
else:
stripdir = None
for index, name in enumerate(names):
if progress_callback:
progress_callback(index + 1, len(names), name)
if name.startswith('..') or name.startswith('/') or os.path.isabs(name):
continue
if check_extract_file and not check_extract_file(name):
continue
if name.endswith('/'):
continue
if stripdir:
filename = name[len(stripdir):]
if not filename:
continue
else:
filename = name
info = archive.getmember(name)
src = archive.extractfile(name)
if not src:
continue
try:
filename = os.path.join(directory, filename)
dirname = os.path.dirname(filename)
if not os.path.exists(dirname):
os.makedirs(dirname)
with builtins.open(filename, 'wb') as dst:
shutil.copyfileobj(src, dst)
os.chmod(filename, info.mode or default_mode)
os.utime(filename, (-1, info.mtime))
finally:
src.close()
if progress_callback:
progress_callback(len(names), len(names), None)"
530,"def transitions_to(self, dst):