diff -r 2612a56e0082 Lib/zipfile.py
--- a/Lib/zipfile.py	Thu Sep 05 14:19:51 2013 +0200
+++ b/Lib/zipfile.py	Wed Oct 16 23:40:49 2013 +0200
@@ -1353,7 +1353,7 @@
 class PyZipFile(ZipFile):
     """Class to create ZIP archives with Python library files and packages."""
 
-    def writepy(self, pathname, basename = ""):
+    def writepy(self, pathname, basename = "", filterfunc=None):
         """Add all files from "pathname" to the ZIP archive.
 
         If pathname is a package directory, search the directory and
@@ -1364,7 +1364,13 @@
         archive.  Added modules are always module.pyo or module.pyc.
         This method will compile the module.py into module.pyc if
         necessary.
+        If filterfunc(pathname) is given, it is called with every argument. 
+        When it is False, the file or directory is skipped.
         """
+        if filterfunc and not filterfunc(pathname):
+            if self.debug:
+                print 'pathname "%s" skipped by filterfunc' % pathname
+            return
         dir, name = os.path.split(pathname)
         if os.path.isdir(pathname):
             initname = os.path.join(pathname, "__init__.py")
@@ -1389,7 +1395,8 @@
                     if os.path.isdir(path):
                         if os.path.isfile(os.path.join(path, "__init__.py")):
                             # This is a package directory, add it
-                            self.writepy(path, basename)  # Recursive call
+                            self.writepy(path, basename,
+                                         filterfunc=filterfunc)  # Recursive call
                     elif ext == ".py":
                         fname, arcname = self._get_codename(path[0:-3],
                                          basename)