Python zipfile.py() Examples

def test_write_pyfile_bad_syntax(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("Bad syntax in python file\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                # syntax errors are printed to stdout
                with captured_stdout() as s:
                    zipfp.writepy(os.path.join(TESTFN2, "mod1.py"))

                self.assertIn("SyntaxError", s.getvalue())

                # as it will not have compiled the python file, it will
                # include the .py file not .pyc
                names = zipfp.namelist()
                self.assertIn('mod1.py', names)
                self.assertNotIn('mod1.pyc', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            zipfp  = zipfile.PyZipFile(TemporaryFile(), "w")
            zipfp.writepy(TESTFN2)

            names = zipfp.namelist()
            self.assertTrue('mod1.pyc' in names or 'mod1.pyo' in names)
            self.assertTrue('mod2.pyc' in names or 'mod2.pyo' in names)
            self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def resolve_symlink(path):
  """Processes path containing symlink on Windows.

  This is needed to make ../swarming_bot/main_test.py pass on Windows because
  git on Windows renders symlinks as normal files.
  """
  if not is_windows():
    # Only does this dance on Windows.
    return path
  parts = os.path.normpath(path).split(os.path.sep)
  for i in range(2, len(parts)):
    partial = os.path.sep.join(parts[:i])
    if os.path.isfile(partial):
      with open(partial) as f:
        link = f.read()
      assert '\n' not in link and link, link
      parts[i-1] = link
  return os.path.normpath(os.path.sep.join(parts)) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2)

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertCompiledIn('mod2.py', names)
                self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory_filtered(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2, filterfunc=lambda fn:
                                                  not fn.endswith('mod2.py'))

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertNotIn('mod2.py', names)

        finally:
            rmtree(TESTFN2) 

def test_write_pyfile_bad_syntax(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("Bad syntax in python file\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                # syntax errors are printed to stdout
                with captured_stdout() as s:
                    zipfp.writepy(os.path.join(TESTFN2, "mod1.py"))

                self.assertIn("SyntaxError", s.getvalue())

                # as it will not have compiled the python file, it will
                # include the .py file not .pyc
                names = zipfp.namelist()
                self.assertIn('mod1.py', names)
                self.assertNotIn('mod1.pyc', names)

        finally:
            rmtree(TESTFN2) 

def test_write_pyfile_bad_syntax(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("Bad syntax in python file\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                # syntax errors are printed to stdout
                with captured_stdout() as s:
                    zipfp.writepy(os.path.join(TESTFN2, "mod1.py"))

                self.assertIn("SyntaxError", s.getvalue())

                # as it will not have compiled the python file, it will
                # include the .py file not .pyc or .pyo
                names = zipfp.namelist()
                self.assertIn('mod1.py', names)
                self.assertNotIn('mod1.pyc', names)
                self.assertNotIn('mod1.pyo', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory_filtered(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2, filterfunc=lambda fn:
                                                  not fn.endswith('mod2.py'))

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertNotIn('mod2.py', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2)

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertCompiledIn('mod2.py', names)
                self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def _create_zipinfo(self, filename, arcname, compress_type):
        # type: (Text, Optional[Text], Optional[int]) -> zipfile.ZipInfo
        # The main thing that prevents deterministic zip file generation
        # is that the mtime of the file is included in the zip metadata.
        # We don't actually care what the mtime is when we run on lambda,
        # so we always set it to the default value (which comes from
        # zipfile.py).  This ensures that as long as the file contents don't
        # change (or the permissions) then we'll always generate the exact
        # same zip file bytes.
        # We also can't use ZipInfo.from_file(), it's only in python3.
        st = self._osutils.stat(str(filename))
        if arcname is None:
            arcname = filename
        arcname = self._osutils.normalized_filename(str(arcname))
        arcname = arcname.lstrip(os.sep)
        zinfo = zipfile.ZipInfo(arcname, self._default_time_time)
        # The external_attr needs the upper 16 bits to be the file mode
        # so we have to shift it up to the right place.
        zinfo.external_attr = (st.st_mode & 0xFFFF) << 16
        zinfo.file_size = st.st_size
        zinfo.compress_type = compress_type or self.compression
        return zinfo 

def test_write_python_directory_filtered(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2, filterfunc=lambda fn:
                                                  not fn.endswith('mod2.py'))

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertNotIn('mod2.py', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2)

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertCompiledIn('mod2.py', names)
                self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2)

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertCompiledIn('mod2.py', names)
                self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory_filtered(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                zipfp.writepy(TESTFN2, filterfunc=lambda fn:
                                                  not fn.endswith('mod2.py'))

                names = zipfp.namelist()
                self.assertCompiledIn('mod1.py', names)
                self.assertNotIn('mod2.py', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            zipfp  = zipfile.PyZipFile(TemporaryFile(), "w")
            zipfp.writepy(TESTFN2)

            names = zipfp.namelist()
            self.assertTrue('mod1.pyc' in names or 'mod1.pyo' in names)
            self.assertTrue('mod2.pyc' in names or 'mod2.pyo' in names)
            self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            zipfp  = zipfile.PyZipFile(TemporaryFile(), "w")
            zipfp.writepy(TESTFN2)

            names = zipfp.namelist()
            self.assertTrue('mod1.pyc' in names or 'mod1.pyo' in names)
            self.assertTrue('mod2.pyc' in names or 'mod2.pyo' in names)
            self.assertNotIn('mod2.txt', names)

        finally:
            shutil.rmtree(TESTFN2) 

def test_write_pyfile_bad_syntax(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("Bad syntax in python file\n")

            with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
                # syntax errors are printed to stdout
                with captured_stdout() as s:
                    zipfp.writepy(os.path.join(TESTFN2, "mod1.py"))

                self.assertIn("SyntaxError", s.getvalue())

                # as it will not have compiled the python file, it will
                # include the .py file not .pyc
                names = zipfp.namelist()
                self.assertIn('mod1.py', names)
                self.assertNotIn('mod1.pyc', names)

        finally:
            rmtree(TESTFN2) 

def test_write_python_directory(self):
        os.mkdir(TESTFN2)
        try:
            with open(os.path.join(TESTFN2, "mod1.py"), "w") as fp:
                fp.write("print(42)\n")

            with open(os.path.join(TESTFN2, "mod2.py"), "w") as fp:
                fp.write("print(42 * 42)\n")

            with open(os.path.join(TESTFN2, "mod2.txt"), "w") as fp:
                fp.write("bla bla bla\n")

            zipfp  = zipfile.PyZipFile(TemporaryFile(), "w")
            zipfp.writepy(TESTFN2)

            names = zipfp.namelist()
            self.assertTrue('mod1.pyc' in names or 'mod1.pyo' in names)
            self.assertTrue('mod2.pyc' in names or 'mod2.pyo' in names)
            self.assertNotIn('mod2.txt', names)

        finally:
            rmtree(TESTFN2) 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = super(VerifyingZipFile, self).open(name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info

        if name in self._expected_hashes and self._expected_hashes[name] is not None:
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def test_write_python_package(self):
        import email
        packagedir = os.path.dirname(email.__file__)
        self.requiresWriteAccess(packagedir)

        with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
            zipfp.writepy(packagedir)

            # Check for a couple of modules at different levels of the
            # hierarchy
            names = zipfp.namelist()
            self.assertCompiledIn('email/__init__.py', names)
            self.assertCompiledIn('email/mime/text.py', names) 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info
        if (name in self._expected_hashes
            and self._expected_hashes[name] != None):
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info
        if (name in self._expected_hashes
            and self._expected_hashes[name] != None):
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def test_from_file(self):
        zi = zipfile.ZipInfo.from_file(__file__)
        self.assertEqual(posixpath.basename(zi.filename), 'test_zipfile.py')
        self.assertFalse(zi.is_dir())
        self.assertEqual(zi.file_size, os.path.getsize(__file__)) 

def test_from_file_pathlike(self):
        zi = zipfile.ZipInfo.from_file(pathlib.Path(__file__))
        self.assertEqual(posixpath.basename(zi.filename), 'test_zipfile.py')
        self.assertFalse(zi.is_dir())
        self.assertEqual(zi.file_size, os.path.getsize(__file__)) 

def test_write_python_package(self):
        import email
        packagedir = os.path.dirname(email.__file__)
        self.requiresWriteAccess(packagedir)

        with TemporaryFile() as t, zipfile.PyZipFile(t, "w") as zipfp:
            zipfp.writepy(packagedir)

            # Check for a couple of modules at different levels of the
            # hierarchy
            names = zipfp.namelist()
            self.assertCompiledIn('email/__init__.py', names)
            self.assertCompiledIn('email/mime/text.py', names) 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info
        if (name in self._expected_hashes
            and self._expected_hashes[name] != None):
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info
        if (name in self._expected_hashes
            and self._expected_hashes[name] != None):
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info
        if (name in self._expected_hashes
            and self._expected_hashes[name] != None):
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info

        if name in self._expected_hashes and self._expected_hashes[name] is not None:
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef 

def open(self, name_or_info, mode="r", pwd=None):
        """Return file-like object for 'name'."""
        # A non-monkey-patched version would contain most of zipfile.py
        ef = zipfile.ZipFile.open(self, name_or_info, mode, pwd)
        if isinstance(name_or_info, zipfile.ZipInfo):
            name = name_or_info.filename
        else:
            name = name_or_info
        if (name in self._expected_hashes
            and self._expected_hashes[name] != None):
            expected_hash = self._expected_hashes[name]
            try:
                _update_crc_orig = ef._update_crc
            except AttributeError:
                warnings.warn('Need ZipExtFile._update_crc to implement '
                              'file hash verification (in Python >= 2.7)')
                return ef
            running_hash = self._hash_algorithm()
            if hasattr(ef, '_eof'):  # py33
                def _update_crc(data):
                    _update_crc_orig(data)
                    running_hash.update(data)
                    if ef._eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            else:
                def _update_crc(data, eof=None):
                    _update_crc_orig(data, eof=eof)
                    running_hash.update(data)
                    if eof and running_hash.digest() != expected_hash:
                        raise BadWheelFile("Bad hash for file %r" % ef.name)
            ef._update_crc = _update_crc
        elif self.strict and name not in self._expected_hashes:
            raise BadWheelFile("No expected hash for file %r" % ef.name)
        return ef