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