Add news about csv module updates.

This commit is contained in:
Andrew McNamara 2005-01-12 03:25:27 +00:00
parent af1e312b3b
commit a08eecb638
1 changed files with 28 additions and 0 deletions

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@ -35,6 +35,34 @@ Extension Modules
Library
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- Enhancements to the csv module:
+ Dialects are now validated by the underlying C code, better
reflecting it's capabilities, and improving it's compliance with
PEP 305.
+ Dialect parameter parsing has been re-implemented to improve error
reporting.
+ quotechar=None and quoting=QUOTE_NONE now work the way PEP 305
dictates.
+ the parser now removes the escapechar prefix from escaped characters.
+ Dialect classes passed to the module are no longer instantiated by
the module before being parsed (the former validation scheme required
this, but the mechanism was unreliable).
+ The dialect registry now contains instances of the internal
C-coded dialect type, rather than references to python objects.
+ the internal c-coded dialect type is now immutable.
+ register_dialect now accepts the same keyword dialect specifications
as the reader and writer, allowing the user to register dialects
without first creating a dialect class.
+ a configurable limit to the size of parsed fields has been added -
previously, an unmatched quote character could result in the entire
file being read into the field buffer before an error was reported.
+ A new module method csv.set_field_limit() has been added that sets
the parser field size limit (returning the former limit). The initial
limit is 128kB.
+ reader and writer objects were not being registered with the cyclic-GC.
This has been fixed.
- _DummyThread objects in the threading module now delete self.__block that is
inherited from _Thread since it uses up a lock allocated by 'thread'. The
lock primitives tend to be limited in number and thus should not be wasted on