Index: Lib/tempfile.py
===================================================================
--- Lib/tempfile.py	(revisione 86275)
+++ Lib/tempfile.py	(copia locale)
@@ -256,7 +256,7 @@
             _once_lock.release()
     return tempdir
 
-def mkstemp(suffix="", prefix=template, dir=None, text=False):
+def mkstemp(suffix="", prefix=None, dir=None, text=False):
     """User-callable function to create and return a unique temporary
     file.  The return value is a pair (fd, name) where fd is the
     file descriptor returned by os.open, and name is the filename.
@@ -284,6 +284,8 @@
 
     if dir is None:
         dir = gettempdir()
+    if prefix is None:
+        prefix = gettempprefix()
 
     if text:
         flags = _text_openflags
@@ -293,7 +295,7 @@
     return _mkstemp_inner(dir, prefix, suffix, flags)
 
 
-def mkdtemp(suffix="", prefix=template, dir=None):
+def mkdtemp(suffix="", prefix=None, dir=None):
     """User-callable function to create and return a unique temporary
     directory.  The return value is the pathname of the directory.
 
@@ -308,6 +310,8 @@
 
     if dir is None:
         dir = gettempdir()
+    if prefix is None:
+        prefix = gettempprefix()
 
     names = _get_candidate_names()
 
@@ -324,7 +328,7 @@
 
     raise IOError, (_errno.EEXIST, "No usable temporary directory name found")
 
-def mktemp(suffix="", prefix=template, dir=None):
+def mktemp(suffix="", prefix=None, dir=None):
     """User-callable function to return a unique temporary file name.  The
     file is not created.
 
@@ -343,6 +347,8 @@
 
     if dir is None:
         dir = gettempdir()
+    if prefix is None:
+        prefix = gettempprefix()
 
     names = _get_candidate_names()
     for seq in xrange(TMP_MAX):
@@ -417,7 +423,7 @@
 
 
 def NamedTemporaryFile(mode='w+b', bufsize=-1, suffix="",
-                       prefix=template, dir=None, delete=True):
+                       prefix=None, dir=None, delete=True):
     """Create and return a temporary file.
     Arguments:
     'prefix', 'suffix', 'dir' -- as for mkstemp.
@@ -433,6 +439,8 @@
 
     if dir is None:
         dir = gettempdir()
+    if prefix is None:
+        prefix = gettempprefix()
 
     if 'b' in mode:
         flags = _bin_openflags
@@ -455,7 +463,7 @@
 
 else:
     def TemporaryFile(mode='w+b', bufsize=-1, suffix="",
-                      prefix=template, dir=None):
+                      prefix=None, dir=None):
         """Create and return a temporary file.
         Arguments:
         'prefix', 'suffix', 'dir' -- as for mkstemp.
@@ -469,6 +477,8 @@
 
         if dir is None:
             dir = gettempdir()
+        if prefix is None:
+            prefix = gettempprefix()
 
         if 'b' in mode:
             flags = _bin_openflags
@@ -491,10 +501,12 @@
     _rolled = False
 
     def __init__(self, max_size=0, mode='w+b', bufsize=-1,
-                 suffix="", prefix=template, dir=None):
+                 suffix="", prefix=None, dir=None):
         self._file = _StringIO()
         self._max_size = max_size
         self._rolled = False
+        if prefix is None:
+            prefix = gettempprefix()
         self._TemporaryFileArgs = (mode, bufsize, suffix, prefix, dir)
 
     def _check(self, file):