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import contextlib
from zipfile import ZipFile
def open_zip(fileobj, mode):
return _Zip(ZipFile(fileobj, mode))
class _Zip(object):
def __init__(self, zip_file):
self._zip_file = zip_file
def __enter__(self):
return self
def __exit__(self, *args):
self._zip_file.close()
def open(self, name):
return contextlib.closing(self._zip_file.open(name))
def exists(self, name):
try:
self._zip_file.getinfo(name)
return True
except KeyError:
return False
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