gio.FileOutputStream Base class for implementing streaming input gio.FileOutputStream gio.OutputStream get_etag query_info attributes cancellableNone query_info_async attributes callback io_priorityglib.PRIORITY_DEFAULT cancellableNone user_dataNone query_info_finish result +-- gobject.GObject +-- gio.OutputStream +-- gio.FileOutputStream gio.FileOutputStream implements gio.Seekable gio.FileOutputStream provides output streams that write their content to a file. gio.FileOutputStream implements gio.Seekable, which allows the output stream to jump to arbitrary positions in the file and to truncate the file, provided the filesystem of the file supports these operations. In addition to the generic gio.Seekable. API, gio.FileOutputStream has its own API for seeking and positioning. To find the position of a file output stream, use gio.Seekable.tell(). To find out if a file output stream supports seeking, use gio.Seekable.can_seek(). To position a file output stream, use gio.Seekable.seek(). To find out if a file output stream supports truncating, use gio.FileOutputStream.can_truncate(). To truncate a file output stream, use gio.Seekable.truncate(). get_etag Returns : the entity tag for the stream. The get_etag() method gets the entity tag for the file when it has been written. This must be called after the stream has been written and closed, as the etag can change while writing. query_info attributes cancellableNone attributes : a file attribute query string. cancellable : optional gio.Cancellable object, None to ignore. Returns : a gio.FileInfo, or None on error. The query_info() method queries a file input stream the given attributes. This function blocks while querying the stream. For the asynchronous (non-blocking) version of this function, see gio.FileOutputStream.query_info_async(). While the stream is blocked, the stream will set the pending flag internally, and any other operations on the stream will fail with gio.ERROR_PENDING. Can fail if the stream was already closed (with error being set to gio.ERROR_CLOSED), the stream has pending operations (with error being set to gio.ERROR_PENDING), or if querying info is not supported for the stream's interface (with error being set to gio.ERROR_NOT_SUPPORTED). In all cases of failure, NULL will be returned. If cancellable is not None, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error gio.ERROR_CANCELLED will be set, and None will be returned. query_info_async attributes callback io_priorityglib.PRIORITY_DEFAULT cancellableNone user_dataNone attributes : a file attribute query string. callback : a GAsyncReadyCallback to call when the request is satisfied. io_priority : the of the request. cancellable : optional gio.Cancellable object, None to ignore. user_data : the data to pass to callback function. The query_info_async() method queries the stream information asynchronously. When the operation is finished callback will be called. You can then call gio.FileOutputStream.query_info_finish() to get the result of the operation. For the synchronous version of this function, see gio.FileOutputStream.query_info(). If cancellable is not None, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error gio.ERROR_CANCELLED will be set query_info_finish result result : a gio.AsyncResult. Returns : a gio.FileInfo, or None on error. The query_info_finish() method finishes an asynchronous file append operation started with gio.FileOutputStream.query_info_async().