save(self, sess, save_path, global_step=None, latest_filename=None, meta_graph_suffix='meta', write_meta_graph=True, write_state=True)
Saves variables.
This method runs the ops added by the constructor for saving variables.
It requires a session in which the graph was launched. The variables to
save must also have been initialized.
The method returns the path prefix of the newly created checkpoint files.
This string can be passed directly to a call to `restore()`.
Args:
sess: A Session to use to save the variables.
save_path: String. Prefix of filenames created for the checkpoint.
global_step: If provided the global step number is appended to
`save_path` to create the checkpoint filenames. The optional argument
can be a `Tensor`, a `Tensor` name or an integer.
latest_filename: Optional name for the protocol buffer file that will
contains the list of most recent checkpoints. That file,
kept in the same directory as the checkpoint files, is automatically
managed by the saver to keep track of recent checkpoints. Defaults to
'checkpoint'.
meta_graph_suffix: Suffix for `MetaGraphDef` file. Defaults to 'meta'.
write_meta_graph: `Boolean` indicating whether or not to write the meta
graph file.
write_state: `Boolean` indicating whether or not to write the
`CheckpointStateProto`.
Returns:
A string: path prefix used for the checkpoint files. If the saver is
sharded, this string ends with: '-?????-of-nnnnn' where 'nnnnn'
is the number of shards created.
If the saver is empty, returns None.
Raises:
TypeError: If `sess` is not a `Session`.
ValueError: If `latest_filename` contains path components, or if it
collides with `save_path`.
RuntimeError: If save and restore ops weren't built.
