storage_location in its argument. It is the base
directory where the data are stored to and loaded from.
For this storage class, all implemented methods of the storage interface which
accept a table_name parameter interpret it as a subdirectory in the base
directory in which each attribute is stored as a single file in a binary format.
The file names correspond to attribute names with an extension that determines
the type of the stored data. The file extension consists of three parts, one
character for the byte order, one character for the type of the data, and one or
more characters for the size of the column in bytes. The extension is similar to
the dtype for numpy arrays, only the charakter for the byte order is changed from
'<', '>', or '|' (for little endian, big endian, or irrelevant) to 'l', 'b', or
'i'. The method write_table() stores attribute according to the scheme
above.