"""

The temp module provides a NamedTemporaryFile that can be re-opened on any

platform. Most platforms use the standard Python tempfile.TemporaryFile class,

but MS Windows users are given a custom class.

This is needed because in Windows NT, the default implementation of

NamedTemporaryFile uses the O_TEMPORARY flag, and thus cannot be reopened [1].

1: http://mail.python.org/pipermail/python-list/2005-December/359474.html

"""

import os

import tempfile

__all__ = ('NamedTemporaryFile', 'gettempdir',)

if os.name == 'nt' and hasattr(os, 'unlink') and hasattr(os, 'fdopen'):

    class TemporaryFile(object):

        """

        Temporary file object constructor that works in Windows and supports

        reopening of the temporary file in windows.

        """

        def __init__(self, mode='w+b', bufsize=-1, suffix='', prefix='',

                dir=None):

            fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix,

                                          dir=dir)

            self.name = name

            self.file = os.fdopen(fd, mode, bufsize)

            self.close_called = False

        # Because close can be called during shutdown

        # we need to cache os.unlink and access it

        # as self.unlink only

        unlink = os.unlink

        def close(self):

            if not self.close_called:

                self.close_called = True

                try:

                    self.file.close()

                except (OSError, IOError):

                    pass

                try:

                    self.unlink(self.name)

                except (OSError):

                    pass

        def __del__(self):

            self.close()

        def read(self, *args):          return self.file.read(*args)

        def seek(self, offset):         return self.file.seek(offset)

        def write(self, s):             return self.file.write(s)

        def __iter__(self):             return iter(self.file)

        def readlines(self, size=None): return self.file.readlines(size)

        def xreadlines(self):           return self.file.xreadlines()

    NamedTemporaryFile = TemporaryFile

else:

    NamedTemporaryFile = tempfile.NamedTemporaryFile

gettempdir = tempfile.gettempdir