8 The modules described in this chapter support storing Python data in a
9 persistent form on disk. The :mod:`pickle` and :mod:`marshal` modules can turn
10 many Python data types into a stream of bytes and then recreate the objects from
11 the bytes. The various DBM-related modules support a family of hash-based file
12 formats that store a mapping of strings to other strings. The :mod:`bsddb`
13 module also provides such disk-based string-to-string mappings based on hashing,
14 and also supports B-Tree and record-based formats.
16 The list of modules described in this chapter is: