pax_global_header00006660000000000000000000000064127131130340014505gustar00rootroot0000000000000052 comment=af6c9b18ca2415dce0541279c4ed22998b15d1d3 python-zipstream-1.1.4/000077500000000000000000000000001271311303400150455ustar00rootroot00000000000000python-zipstream-1.1.4/.gitignore000066400000000000000000000005111271311303400170320ustar00rootroot00000000000000*.py[cod] # C extensions *.so # Packages *.egg *.egg-info dist build eggs parts bin var sdist develop-eggs .installed.cfg lib lib64 __pycache__ # Installer logs pip-log.txt # Unit test / coverage reports .coverage .tox nosetests.xml # Translations *.mo # Mr Developer .mr.developer.cfg .project .pydevproject *.zip .eggs/ python-zipstream-1.1.4/.travis.yml000066400000000000000000000002331271311303400171540ustar00rootroot00000000000000language: python python: - "2.6" - "2.7" - "3.2" - "3.3" - "3.4" - "3.5" - "pypy" install: - "pip install ." script: nosetests sudo: false python-zipstream-1.1.4/LICENSE000066400000000000000000001045131271311303400160560ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. 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But first, please read . python-zipstream-1.1.4/README.markdown000066400000000000000000000100601271311303400175430ustar00rootroot00000000000000 # python-zipstream [![Build Status](https://travis-ci.org/allanlei/python-zipstream.png?branch=master)](https://travis-ci.org/allanlei/python-zipstream) [![Coverage Status](https://coveralls.io/repos/allanlei/python-zipstream/badge.png)](https://coveralls.io/r/allanlei/python-zipstream) zipstream.py is a zip archive generator based on python 3.3's zipfile.py. It was created to generate a zip file generator for streaming (ie web apps). This is beneficial for when you want to provide a downloadable archive of a large collection of regular files, which would be infeasible to generate the archive prior to downloading or of a very large file that you do not want to store entirely on disk or on memory. The archive is generated as an iterator of strings, which, when joined, form the zip archive. For example, the following code snippet would write a zip archive containing files from 'path' to a normal file: ```python import zipstream z = zipstream.ZipFile() z.write('path/to/files') with open('zipfile.zip', 'wb') as f: for data in z: f.write(data) ``` zipstream also allows to take as input a byte string iterable and to generate the archive as an iterator. This avoids storing large files on disk or in memory. To do so you could use something like this snippet: ```python def iterable(): for _ in xrange(10): yield b'this is a byte string\x01\n' z = zipstream.ZipFile() z.write_iter(iterable(), 'my_archive_iter') with open('zipfile.zip', 'wb') as f: for data in z: f.write(data) ``` Of course both approach can be combined: ```python def iterable(): for _ in xrange(10): yield b'this is a byte string\x01\n' z = zipstream.ZipFile() z.write('path/to/files', 'my_archive_files') z.write_iter('my_archive_iter', iterable()) with open('zipfile.zip', 'wb') as f: for data in z: f.write(data) ``` Since recent versions of web.py support returning iterators of strings to be sent to the browser, to download a dynamically generated archive, you could use something like this snippet: ```python def GET(self): path = '/path/to/dir/of/files' zip_filename = 'files.zip' web.header('Content-type' , 'application/zip') web.header('Content-Disposition', 'attachment; filename="%s"' % ( zip_filename,)) return zipstream.ZipFile(path) ``` If the zlib module is available, zipstream.ZipFile can generate compressed zip archives. ## Installation ``` pip install zipstream ``` ## Requirements * Python 2.6, 2.7, 3.2, 3.3, pypy ## Examples ### flask ```python from flask import Response @app.route('/package.zip', methods=['GET'], endpoint='zipball') def zipball(): def generator(): z = zipstream.ZipFile(mode='w', compression=ZIP_DEFLATED) z.write('/path/to/file') for chunk in z: yield chunk response = Response(generator(), mimetype='application/zip') response.headers['Content-Disposition'] = 'attachment; filename={}'.format('files.zip') return response # or @app.route('/package.zip', methods=['GET'], endpoint='zipball') def zipball(): z = zipstream.ZipFile(mode='w', compression=ZIP_DEFLATED) z.write('/path/to/file') response = Response(z, mimetype='application/zip') response.headers['Content-Disposition'] = 'attachment; filename={}'.format('files.zip') return response ``` ### django 1.5+ ```python from django.http import StreamingHttpResponse def zipball(request): z = zipstream.ZipFile(mode='w', compression=ZIP_DEFLATED) z.write('/path/to/file') response = StreamingHttpResponse(z, mimetype='application/zip') response['Content-Disposition'] = 'attachment; filename={}'.format('files.zip') return response ``` ### webpy ```python def GET(self): path = '/path/to/dir/of/files' zip_filename = 'files.zip' web.header('Content-type' , 'application/zip') web.header('Content-Disposition', 'attachment; filename="%s"' % ( zip_filename,)) return zipstream.ZipFile(path) ``` ## Running tests With python version > 2.6, just run the following command: `python -m unittest discover` Alternatively, you can use `nose`. python-zipstream-1.1.4/example.py000066400000000000000000000011571271311303400170560ustar00rootroot00000000000000# -*- coding: utf-8 -*- import os import zipstream import zipfile with zipstream.ZipFile(mode='w', compression=zipstream.ZIP_DEFLATED) as z: z.write('LICENSE') z.write('LICENSE', arcname='stuff/LICENSE') with open('tests/sample.rtf', 'rb') as fp: z.writestr('sample.rtf', fp.read()) for root, directories, files in os.walk('zipstream'): for filename in files: path = os.path.join(root, filename) z.write(path, path) with open('test.zip', 'wb') as f: for chunk in z: f.write(chunk) with zipfile.ZipFile('test.zip') as z: z.testzip() python-zipstream-1.1.4/setup.py000066400000000000000000000006461271311303400165650ustar00rootroot00000000000000# -*- coding: utf-8 -*- from setuptools import setup, find_packages setup( name='zipstream', version='1.1.4', description='Zipfile generator', author='Allan Lei', author_email='allanlei@helveticode.com', url='https://github.com/allanlei/python-zipstream', packages=find_packages(exclude=['tests']), keywords='zip streaming', test_suite='nose.collector', tests_require=['nose'], ) 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\formshade\paperh15840\paperw12240\margl1134\margr1134\margt1134\margb1134\sectd\sbknone\sectunlocked1\pgndec\pgwsxn12240\pghsxn15840\marglsxn1134\margrsxn1134\margtsxn1134\margbsxn1134\ftnbj\ftnstart1\ftnrstcont\ftnnar\aenddoc\aftnrstcont\aftnstart1\aftnnrlc {\*\ftnsep\chftnsep}\pgndec\pard\plain \s20\sb0\sa0\dbch\af7\dbch\af5\afs20\loch\f5\fs20{\rtlch \ltrch\loch Hello World} \par }python-zipstream-1.1.4/tests/test_pointerio.py000066400000000000000000000043521271311303400216340ustar00rootroot00000000000000# -*- coding: utf-8 -*- from __future__ import unicode_literals import unittest import zipstream class PointerIOTestCase(unittest.TestCase): def test_init_no_args(self): zipstream.PointerIO() def test_init_mode(self): try: zipstream.PointerIO('wb') except Exception as err: self.fail(err) for mode in ['w', 'r', 'rb', 'a', 'ab']: self.assertRaises(Exception, zipstream.PointerIO, mode=mode) for mode in ['w', 'wb''r', 'rb', 'a', 'ab']: self.assertRaises(Exception, zipstream.PointerIO, mode=mode + '+') def test_has_fileobj_attrs(self): fileobj = zipstream.PointerIO() self.assertTrue(hasattr(fileobj, 'write')) self.assertTrue(hasattr(fileobj, 'close')) self.assertTrue(hasattr(fileobj, 'tell')) def test_write_bytes(self): fileobj = zipstream.PointerIO() data = b'Im a little tea pot' try: fileobj.write(data) except Exception as err: self.fail(err) self.assertEqual(fileobj.tell(), 19) def test_write_unicode(self): fileobj = zipstream.PointerIO() data = 'Im a little tea pot' try: fileobj.write(data) except Exception as err: self.fail(err) self.assertEqual(fileobj.tell(), 19) fileobj = zipstream.PointerIO() data = '幋 儳鑤 寱懤擨 拻敁柧' try: fileobj.write(data) except Exception as err: self.fail(err) self.assertEqual(fileobj.tell(), 30) def test_write_non_string_type(self): fileobj = zipstream.PointerIO() data = None self.assertRaises(TypeError, fileobj.write, data) fileobj = zipstream.PointerIO() data = [] self.assertRaises(TypeError, fileobj.write, data) fileobj = zipstream.PointerIO() data = tuple() self.assertRaises(TypeError, fileobj.write, data) fileobj = zipstream.PointerIO() data = 1 self.assertRaises(TypeError, fileobj.write, data) fileobj = zipstream.PointerIO() data = 1.00 self.assertRaises(TypeError, fileobj.write, data) if __name__ == '__main__': unittest.main()python-zipstream-1.1.4/tests/test_zipstream.py000066400000000000000000000051571271311303400216460ustar00rootroot00000000000000# -*- coding: utf-8 -*- from __future__ import unicode_literals, print_function import os import tempfile import unittest import zipstream import zipfile SAMPLE_FILE_RTF = 'tests/sample.rtf' class ZipInfoTestCase(unittest.TestCase): pass class ZipStreamTestCase(unittest.TestCase): def setUp(self): self.fileobjs = [ tempfile.NamedTemporaryFile(delete=False, suffix='.txt'), tempfile.NamedTemporaryFile(delete=False, suffix='.py'), ] def tearDown(self): for fileobj in self.fileobjs: fileobj.close() os.remove(fileobj.name) def test_init_no_args(self): zipstream.ZipFile() def test_init_mode(self): try: zipstream.ZipFile(mode='w') except Exception as err: self.fail(err) for mode in ['wb', 'r', 'rb', 'a', 'ab']: self.assertRaises(Exception, zipstream.ZipFile, mode=mode) for mode in ['wb', 'r', 'rb', 'a', 'ab']: self.assertRaises(Exception, zipstream.ZipFile, mode=mode + '+') def test_write_file(self): z = zipstream.ZipFile(mode='w') for fileobj in self.fileobjs: z.write(fileobj.name) f = tempfile.NamedTemporaryFile(suffix='zip', delete=False) for chunk in z: f.write(chunk) f.close() z2 = zipfile.ZipFile(f.name, 'r') self.assertFalse(z2.testzip()) os.remove(f.name) def test_write_iterable(self): z = zipstream.ZipFile(mode='w') def string_generator(): for _ in range(10): yield b'zipstream\x01\n' data = [string_generator(), string_generator()] for i, d in enumerate(data): z.write_iter(iterable=d, arcname='data_{0}'.format(i)) f = tempfile.NamedTemporaryFile(suffix='zip', delete=False) for chunk in z: f.write(chunk) f.close() z2 = zipfile.ZipFile(f.name, 'r') self.assertFalse(z2.testzip()) os.remove(f.name) def test_writestr(self): z = zipstream.ZipFile(mode='w') with open(SAMPLE_FILE_RTF, 'rb') as fp: z.writestr('sample.rtf', fp.read()) f = tempfile.NamedTemporaryFile(suffix='zip', delete=False) for chunk in z: f.write(chunk) f.close() z2 = zipfile.ZipFile(f.name, 'r') self.assertFalse(z2.testzip()) os.remove(f.name) def test_write_iterable_no_archive(self): z = zipstream.ZipFile(mode='w') self.assertRaises(TypeError, z.write_iter, iterable=range(10)) if __name__ == '__main__': unittest.main() python-zipstream-1.1.4/tox.ini000066400000000000000000000001551271311303400163610ustar00rootroot00000000000000[tox] envlist = py26, py27, py32, py33, py34, py35, pypy [testenv] deps=nose commands = nosetests {posargs} python-zipstream-1.1.4/zipstream/000077500000000000000000000000001271311303400170635ustar00rootroot00000000000000python-zipstream-1.1.4/zipstream/__init__.py000066400000000000000000000423071271311303400212020ustar00rootroot00000000000000# -*- coding: utf-8 -*- """ Iterable ZIP archive generator. Derived directly from zipfile.py """ from __future__ import unicode_literals, print_function, with_statement __version__ = '1.1.4' import os import sys import stat import struct import time import zipfile from .compat import ( str, bytes, ZIP64_VERSION, ZIP_BZIP2, BZIP2_VERSION, ZIP_LZMA, LZMA_VERSION, SEEK_SET, SEEK_CUR, SEEK_END) from zipfile import ( ZIP_STORED, ZIP64_LIMIT, ZIP_FILECOUNT_LIMIT, ZIP_MAX_COMMENT, ZIP_DEFLATED, structCentralDir, structEndArchive64, structEndArchive, structEndArchive64Locator, stringCentralDir, stringEndArchive64, stringEndArchive, stringEndArchive64Locator, structFileHeader, stringFileHeader, zlib, crc32) stringDataDescriptor = b'PK\x07\x08' # magic number for data descriptor def _get_compressor(compress_type): if compress_type == ZIP_DEFLATED: return zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION, zlib.DEFLATED, -15) elif compress_type == ZIP_BZIP2: from zipfile import bz2 return bz2.BZ2Compressor() elif compress_type == ZIP_LZMA: from zipfile import LZMACompressor return LZMACompressor() else: return None class PointerIO(object): def __init__(self, mode='wb'): if mode not in ('wb', ): raise RuntimeError('zipstream.ZipFile() requires mode "wb"') self.data_pointer = 0 self.__mode = mode self.__closed = False @property def mode(self): return self.__mode @property def closed(self): return self.__closed def close(self): self.__closed = True def flush(self): pass def next(self): raise NotImplementedError() # def seek(self, offset, whence=None): # if whence == SEEK_SET: # if offset < 0: # raise ValueError('negative seek value -1') # self.data_pointer = offset # elif whence == SEEK_CUR: # self.data_pointer = max(0, self.data_pointer + offset) # elif whence == SEEK_END: # self.data_pointer = max(0, offset) # return self.data_pointer def tell(self): return self.data_pointer def truncate(size=None): raise NotImplementedError() def write(self, data): if self.closed: raise ValueError('I/O operation on closed file') if isinstance(data, str): data = data.encode('utf-8') if not isinstance(data, bytes): raise TypeError('expected bytes') self.data_pointer += len(data) return data class ZipInfo(zipfile.ZipInfo): def __init__(self, *args, **kwargs): zipfile.ZipInfo.__init__(self, *args, **kwargs) self.flag_bits = 0x08 # ZIP flag bits, bit 3 indicates presence of data descriptor def FileHeader(self, zip64=None): """Return the per-file header as a string.""" dt = self.date_time dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2] dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2) if self.flag_bits & 0x08: # Set these to zero because we write them after the file data CRC = compress_size = file_size = 0 else: CRC = self.CRC compress_size = self.compress_size file_size = self.file_size extra = self.extra min_version = 0 if zip64 is None: zip64 = file_size > ZIP64_LIMIT or compress_size > ZIP64_LIMIT if zip64: fmt = b' ZIP64_LIMIT or compress_size > ZIP64_LIMIT: if not zip64: raise LargeZipFile("Filesize would require ZIP64 extensions") # File is larger than what fits into a 4 byte integer, # fall back to the ZIP64 extension file_size = 0xffffffff compress_size = 0xffffffff min_version = ZIP64_VERSION if self.compress_type == ZIP_BZIP2: min_version = max(BZIP2_VERSION, min_version) elif self.compress_type == ZIP_LZMA: min_version = max(LZMA_VERSION, min_version) self.extract_version = max(min_version, self.extract_version) self.create_version = max(min_version, self.create_version) filename, flag_bits = self._encodeFilenameFlags() header = struct.pack(structFileHeader, stringFileHeader, self.extract_version, self.reserved, flag_bits, self.compress_type, dostime, dosdate, CRC, compress_size, file_size, len(filename), len(extra)) return header + filename + extra def DataDescriptor(self): """ crc-32 4 bytes compressed size 4 bytes uncompressed size 4 bytes """ if self.compress_size > ZIP64_LIMIT or self.file_size > ZIP64_LIMIT: fmt = b'<4sLQQ' else: fmt = b'<4sLLL' return struct.pack(fmt, stringDataDescriptor, self.CRC, self.compress_size, self.file_size) class ZipFile(zipfile.ZipFile): def __init__(self, fileobj=None, mode='w', compression=ZIP_STORED, allowZip64=False): """Open the ZIP file with mode write "w".""" if mode not in ('w', ): raise RuntimeError('zipstream.ZipFile() requires mode "w"') if fileobj is None: fileobj = PointerIO() self._comment = b'' zipfile.ZipFile.__init__(self, fileobj, mode=mode, compression=compression, allowZip64=allowZip64) # TODO: Refractor to write queue with args + kwargs matching write() self.paths_to_write = [] def __iter__(self): for kwargs in self.paths_to_write: for data in self.__write(**kwargs): yield data for data in self.__close(): yield data def __enter__(self): return self def __exit__(self, type, value, traceback): self.close() @property def comment(self): """The comment text associated with the ZIP file.""" return self._comment @comment.setter def comment(self, comment): if not isinstance(comment, bytes): raise TypeError("comment: expected bytes, got %s" % type(comment)) # check for valid comment length if len(comment) >= ZIP_MAX_COMMENT: if self.debug: print('Archive comment is too long; truncating to %d bytes' % ZIP_MAX_COMMENT) comment = comment[:ZIP_MAX_COMMENT] self._comment = comment self._didModify = True def write(self, filename, arcname=None, compress_type=None): # TODO: Reflect python's Zipfile.write # - if filename is file, write as file # - if filename is directory, write an empty directory kwargs = {'filename': filename, 'arcname': arcname, 'compress_type': compress_type} self.paths_to_write.append(kwargs) def write_iter(self, arcname, iterable, compress_type=None): """Write the bytes iterable `iterable` to the archive under the name `arcname`.""" kwargs = {'arcname': arcname, 'iterable': iterable, 'compress_type': compress_type} self.paths_to_write.append(kwargs) def writestr(self, arcname, data, compress_type=None): """ Writes a str into ZipFile by wrapping data as a generator """ def _iterable(): yield data return self.write_iter(arcname, _iterable(), compress_type=compress_type) def __write(self, filename=None, iterable=None, arcname=None, compress_type=None): """Put the bytes from filename into the archive under the name `arcname`.""" if not self.fp: raise RuntimeError( "Attempt to write to ZIP archive that was already closed") if (filename is None and iterable is None) or (filename is not None and iterable is not None): raise ValueError("either (exclusively) filename or iterable shall be not None") if filename: st = os.stat(filename) isdir = stat.S_ISDIR(st.st_mode) mtime = time.localtime(st.st_mtime) date_time = mtime[0:6] else: st, isdir, date_time = None, False, time.localtime()[0:6] # Create ZipInfo instance to store file information if arcname is None: arcname = filename arcname = os.path.normpath(os.path.splitdrive(arcname)[1]) while arcname[0] in (os.sep, os.altsep): arcname = arcname[1:] if isdir: arcname += '/' zinfo = ZipInfo(arcname, date_time) if st: zinfo.external_attr = (st[0] & 0xFFFF) << 16 # Unix attributes else: zinfo.external_attr = 0o600 << 16 # ?rw------- if compress_type is None: zinfo.compress_type = self.compression else: zinfo.compress_type = compress_type if st: zinfo.file_size = st[6] else: zinfo.file_size = 0 zinfo.flag_bits = 0x00 zinfo.flag_bits |= 0x08 # ZIP flag bits, bit 3 indicates presence of data descriptor zinfo.header_offset = self.fp.tell() # Start of header bytes if zinfo.compress_type == ZIP_LZMA: # Compressed data includes an end-of-stream (EOS) marker zinfo.flag_bits |= 0x02 self._writecheck(zinfo) self._didModify = True if isdir: zinfo.file_size = 0 zinfo.compress_size = 0 zinfo.CRC = 0 self.filelist.append(zinfo) self.NameToInfo[zinfo.filename] = zinfo yield self.fp.write(zinfo.FileHeader(False)) return cmpr = _get_compressor(zinfo.compress_type) # Must overwrite CRC and sizes with correct data later zinfo.CRC = CRC = 0 zinfo.compress_size = compress_size = 0 # Compressed size can be larger than uncompressed size zip64 = self._allowZip64 and \ zinfo.file_size * 1.05 > ZIP64_LIMIT yield self.fp.write(zinfo.FileHeader(zip64)) file_size = 0 if filename: with open(filename, 'rb') as fp: while 1: buf = fp.read(1024 * 8) if not buf: break file_size = file_size + len(buf) CRC = crc32(buf, CRC) & 0xffffffff if cmpr: buf = cmpr.compress(buf) compress_size = compress_size + len(buf) yield self.fp.write(buf) else: # we have an iterable for buf in iterable: file_size = file_size + len(buf) CRC = crc32(buf, CRC) & 0xffffffff if cmpr: buf = cmpr.compress(buf) compress_size = compress_size + len(buf) yield self.fp.write(buf) if cmpr: buf = cmpr.flush() compress_size = compress_size + len(buf) yield self.fp.write(buf) zinfo.compress_size = compress_size else: zinfo.compress_size = file_size zinfo.CRC = CRC zinfo.file_size = file_size if not zip64 and self._allowZip64: if file_size > ZIP64_LIMIT: raise RuntimeError('File size has increased during compressing') if compress_size > ZIP64_LIMIT: raise RuntimeError('Compressed size larger than uncompressed size') # Seek backwards and write file header (which will now include # correct CRC and file sizes) # position = self.fp.tell() # Preserve current position in file # self.fp.seek(zinfo.header_offset, 0) # self.fp.write(zinfo.FileHeader(zip64)) # self.fp.seek(position, 0) yield self.fp.write(zinfo.DataDescriptor()) self.filelist.append(zinfo) self.NameToInfo[zinfo.filename] = zinfo def __close(self): """Close the file, and for mode "w" write the ending records.""" if self.fp is None: return try: if self.mode in ('w', 'a') and self._didModify: # write ending records count = 0 pos1 = self.fp.tell() for zinfo in self.filelist: # write central directory count = count + 1 dt = zinfo.date_time dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2] dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2) extra = [] if zinfo.file_size > ZIP64_LIMIT \ or zinfo.compress_size > ZIP64_LIMIT: extra.append(zinfo.file_size) extra.append(zinfo.compress_size) file_size = 0xffffffff compress_size = 0xffffffff else: file_size = zinfo.file_size compress_size = zinfo.compress_size if zinfo.header_offset > ZIP64_LIMIT: extra.append(zinfo.header_offset) header_offset = 0xffffffff else: header_offset = zinfo.header_offset extra_data = zinfo.extra min_version = 0 if extra: # Append a ZIP64 field to the extra's extra_data = struct.pack( b'= ZIP_FILECOUNT_LIMIT or centDirOffset > ZIP64_LIMIT or centDirSize > ZIP64_LIMIT): # Need to write the ZIP64 end-of-archive records zip64endrec = struct.pack( structEndArchive64, stringEndArchive64, 44, 45, 45, 0, 0, centDirCount, centDirCount, centDirSize, centDirOffset) yield self.fp.write(zip64endrec) zip64locrec = struct.pack( structEndArchive64Locator, stringEndArchive64Locator, 0, pos2, 1) yield self.fp.write(zip64locrec) centDirCount = min(centDirCount, 0xFFFF) centDirSize = min(centDirSize, 0xFFFFFFFF) centDirOffset = min(centDirOffset, 0xFFFFFFFF) endrec = struct.pack(structEndArchive, stringEndArchive, 0, 0, centDirCount, centDirCount, centDirSize, centDirOffset, len(self._comment)) yield self.fp.write(endrec) yield self.fp.write(self._comment) self.fp.flush() finally: fp = self.fp self.fp = None if not self._filePassed: fp.close() python-zipstream-1.1.4/zipstream/compat.py000066400000000000000000000023041271311303400207170ustar00rootroot00000000000000# -*- coding: utf-8 -*- """ pythoncompat Copied from requests """ import sys # ------- # Pythons # ------- PY2 = sys.version_info[0] == 2 PY3 = sys.version_info[0] == 3 # --------- # Specifics # --------- if PY2: builtin_str = str bytes = str str = unicode basestring = basestring numeric_types = (int, long, float) elif PY3: builtin_str = str str = str bytes = bytes basestring = (str, bytes) numeric_types = (int, float) try: from zipfile import ZIP64_VERSION except ImportError: ZIP64_VERSION = 45 try: from zipfile import BZIP2_VERSION except ImportError: BZIP2_VERSION = 46 try: from zipfile import ZIP_BZIP2 except ImportError: ZIP_BZIP2 = 12 try: from zipfile import LZMA_VERSION except ImportError: LZMA_VERSION = 63 try: from zipfile import ZIP_LZMA except ImportError: ZIP_LZMA = 14 try: from zipfile import ZIP_MAX_COMMENT except ImportError: ZIP_MAX_COMMENT = (1 << 16) - 1 # Copy from io SEEK_SET = 0 # start of the stream (the default); offset should be zero or positive SEEK_CUR = 1 # current stream position; offset may be negative SEEK_END = 2 # end of the stream; offset is usually negative