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Diffstat (limited to 'Doc/library/tempfile.rst')
| -rw-r--r-- | Doc/library/tempfile.rst | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/Doc/library/tempfile.rst b/Doc/library/tempfile.rst index bc1f23a204..d78159d64b 100644 --- a/Doc/library/tempfile.rst +++ b/Doc/library/tempfile.rst @@ -25,7 +25,7 @@ instead a string of six random characters is used. Also, all the user-callable functions now take additional arguments which allow direct control over the location and name of temporary files. It is -no longer necessary to use the global *tempdir* and *template* variables. +no longer necessary to use the global *tempdir* variable. To maintain backward compatibility, the argument order is somewhat odd; it is recommended to use keyword arguments for clarity. @@ -76,31 +76,35 @@ The module defines the following user-callable items: data is spooled in memory until the file size exceeds *max_size*, or until the file's :func:`fileno` method is called, at which point the contents are written to disk and operation proceeds as with - :func:`TemporaryFile`. Also, it's ``truncate`` method does not - accept a ``size`` argument. + :func:`TemporaryFile`. The resulting file has one additional method, :func:`rollover`, which causes the file to roll over to an on-disk file regardless of its size. The returned object is a file-like object whose :attr:`_file` attribute - is either a :class:`BytesIO` or :class:`StringIO` object (depending on + is either a :class:`io.BytesIO` or :class:`io.StringIO` object (depending on whether binary or text *mode* was specified) or a true file object, depending on whether :func:`rollover` has been called. This file-like object can be used in a :keyword:`with` statement, just like a normal file. + .. versionchanged:: 3.3 + the truncate method now accepts a ``size`` argument. + .. function:: TemporaryDirectory(suffix='', prefix='tmp', dir=None) This function creates a temporary directory using :func:`mkdtemp` (the supplied arguments are passed directly to the underlying function). The resulting object can be used as a context manager (see - :ref:`context-managers`). On completion of the context (or destruction - of the temporary directory object), the newly created temporary directory + :ref:`context-managers`). On completion of the context or destruction + of the temporary directory object the newly created temporary directory and all its contents are removed from the filesystem. - The directory name can be retrieved from the :attr:`name` attribute - of the returned object. + The directory name can be retrieved from the :attr:`name` attribute of the + returned object. When the returned object is used as a context manager, the + :attr:`name` will be assigned to the target of the :keyword:`as` clause in + the :keyword:`with` statement, if there is one. The directory can be explicitly cleaned up by calling the :func:`cleanup` method. |