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4. String Services

The modules described in this chapter provide a wide range of string manipulation operations. Here's an overview:

`string` | Common string operations.
`re` | Perl-style regular expression search and match operations.
`regex` | Regular expression search and match operations.
`regsub` | Substitution and splitting operations that use regular expressions.
`struct` | Interpret strings as packed binary data.
`StringIO` | Read and write strings as if they were files.
`cStringIO` | Faster version of `StringIO`, but not subclassable.