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It now provides three new functions, NamedTemporaryFile , mkstemp , and mkdtemp , which should eliminate all remaining need to use the insecure mktemp function. Temporary file names created by this module no longer contain the process ID; 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. To maintain backward compatibility, the argument order is somewhat odd; it is recommended to use keyword arguments for clarity.
Return a file-like object that can be used as a temporary storage area. The file is created using mkstemp. It will be destroyed as soon as it is closed including an implicit close when the object is garbage collected. Under Unix, the directory entry for the file is removed immediately after the file is created. Other platforms do not support this; your code should not rely on a temporary file created using this function having or not having a visible name in the file system.
Binary mode is used so that it behaves consistently on all platforms without regard for the data that is stored. The dir , prefix and suffix parameters are passed to mkstemp.
On other platforms, it is a file-like object whose file attribute is the underlying true file object. This file-like object can be used in a with statement, just like a normal file. This function operates exactly as TemporaryFile does, except that the file is guaranteed to have a visible name in the file system on Unix, the directory entry is not unlinked. That name can be retrieved from the name attribute of the returned file-like object.
Whether the name can be used to open the file a second time, while the named temporary file is still open, varies across platforms it can be so used on Unix; it cannot on Windows NT or later.
If delete is true the default , the file is deleted as soon as it is closed. The returned object is always a file-like object whose file attribute is the underlying true file object. The resulting file has one additional method, rollover , which causes the file to roll over to an on-disk file regardless of its size. Creates a temporary file in the most secure manner possible. The file is readable and writable only by the creating user ID.
If the platform uses permission bits to indicate whether a file is executable, the file is executable by no one.
The file descriptor is not inherited by child processes. Unlike TemporaryFile , the user of mkstemp is responsible for deleting the temporary file when done with it. If suffix is specified, the file name will end with that suffix, otherwise there will be no suffix.
If prefix is specified, the file name will begin with that prefix; otherwise, a default prefix is used. If dir is specified, the file will be created in that directory; otherwise, a default directory is used. There is thus no guarantee that the generated filename will have any nice properties, such as not requiring quoting when passed to external commands via os.
If text is specified, it indicates whether to open the file in binary mode the default or text mode. On some platforms, this makes no difference. Creates a temporary directory in the most secure manner possible. The directory is readable, writable, and searchable only by the creating user ID.
The user of mkdtemp is responsible for deleting the temporary directory and its contents when done with it. The prefix , suffix , and dir arguments are the same as for mkstemp. Deprecated since version 2. Return an absolute pathname of a file that did not exist at the time the call is made. Use of this function may introduce a security hole in your program.
By the time you get around to doing anything with the file name it returns, someone else may have beaten you to the punch. The module uses a global variable that tell it how to construct a temporary name. They are initialized at the first call to any of the functions above. The caller may change them, but this is discouraged; use the appropriate function arguments, instead. When set to a value other than None , this variable defines the default value for the dir argument to all the functions defined in this module.
If tempdir is unset or None at any call to any of the above functions, Python searches a standard list of directories and sets tempdir to the first one which the calling user can create files in. Return the directory currently selected to create temporary files in. If tempdir is not None , this simply returns its contents; otherwise, the search described above is performed, and the result returned. When set to a value other than None , this variable defines the prefix of the final component of the filenames returned by mktemp.
A string of six random letters and digits is appended to the prefix to make the filename unique. The default prefix is tmp. Older versions of this module used to require that template be set to None after a call to os.
Return the filename prefix used to create temporary files. This does not contain the directory component. Using this function is preferred over reading the template variable directly. It works on all supported platforms.
The module defines the following user-callable functions: New in version 2. Warning Use of this function may introduce a security hole in your program. The Python Software Foundation is a non-profit corporation. Last updated on Feb 03, Created using Sphinx 1.