1. python_mirrors
  2. features/pep-416


Ronald Oussoren  committed faca97c

Merged revisions 78097 via svnmerge from

r78097 | ronald.oussoren | 2010-02-07 21:18:02 +0100 (Sun, 07 Feb 2010) | 2 lines

Issue 6003: ZipFile.writestr "compression_type" argument

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File Doc/library/zipfile.rst

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       byte, the name of the file in the archive will be truncated at the null byte.
-.. method:: ZipFile.writestr(zinfo_or_arcname, bytes)
+.. method:: ZipFile.writestr(zinfo_or_arcname, bytes[, compress_type])
    Write the string *bytes* to the archive; *zinfo_or_arcname* is either the file
    name it will be given in the archive, or a :class:`ZipInfo` instance.  If it's
    created with mode ``'r'``  will raise a :exc:`RuntimeError`.  Calling
    :meth:`writestr` on a closed ZipFile will raise a :exc:`RuntimeError`.
+   If given, *compress_type* overrides the value given for the *compression*
+   parameter to the constructor for the new entry, or in the *zinfo_or_arcname*
+   (if that is a :class:`ZipInfo` instance).
    .. note::
       When passing a :class:`ZipInfo` instance as the *zinfo_or_acrname* parameter,
       member of the given :class:`ZipInfo` instance.  By default, the
       :class:`ZipInfo` constructor sets this member to :const:`ZIP_STORED`.
+   .. versionchanged:: 2.7
+      The *compression_type* argument.
 The following data attributes are also available:

File Lib/test/test_zipfile.py

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         # remove the test file subdirectories
         shutil.rmtree(os.path.join(os.getcwd(), 'ziptest2dir'))
+    def test_writestr_compression(self):
+        zipfp = zipfile.ZipFile(TESTFN2, "w")
+        zipfp.writestr("a.txt", "hello world", compress_type=zipfile.ZIP_STORED)
+        if zlib:
+            zipfp.writestr("b.txt", "hello world", compress_type=zipfile.ZIP_DEFLATED)
+        info = zipfp.getinfo('a.txt')
+        self.assertEqual(info.compress_type, zipfile.ZIP_STORED)
+        if zlib:
+            info = zipfp.getinfo('b.txt')
+            self.assertEqual(info.compress_type, zipfile.ZIP_DEFLATED)
     def zip_test_writestr_permissions(self, f, compression):
         # Make sure that writestr creates files with mode 0600,
         # when it is passed a name rather than a ZipInfo instance.

File Lib/zipfile.py

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         self.NameToInfo[zinfo.filename] = zinfo
-    def writestr(self, zinfo_or_arcname, data):
+    def writestr(self, zinfo_or_arcname, data, compress_type=None):
         """Write a file into the archive.  The contents is 'data', which
         may be either a 'str' or a 'bytes' instance; if it is a 'str',
         it is encoded as UTF-8 first.
         zinfo.file_size = len(data)            # Uncompressed size
         zinfo.header_offset = self.fp.tell()    # Start of header data
+        if compress_type is not None:
+            zinfo.compress_type = compress_type
         self._didModify = True
         zinfo.CRC = crc32(data) & 0xffffffff       # CRC-32 checksum

File Misc/NEWS

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+- Issue #6003: add an argument to ``zipfile.Zipfile.writestr`` to
+  specify the compression type.
 - Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
   specified, rather than fall through to AF_PACKET (in the `socket` module).
   Also, raise ValueError rather than TypeError when an unknown TIPC address