merge_config and read_config methods accepts a file parameter, but those methods doesn't work as expected if set_config_file has not been called before with the same file parameter.
(Because _unmarshall_reader calls _get_config_type which itself calls _get_config_file)
merge_config
andread_config
methods accepts afile
parameter, but those methods doesn't work as expected ifset_config_file
has not been called before with the samefile
parameter.(Because
_unmarshall_reader
calls_get_config_type
which itself calls_get_config_file
)