[Python-Dev] parsers and compilers for 2.0 (original) (raw)

Finn Bock bckfnn@worldonline.dk
Sat, 12 Aug 2000 23:29:14 GMT

[Neil Schemenauer]

With all the recent proposed and accepted language changes, we should be a careful to keep everything up to date. The parser module, Jeremy's compiler, and I suspect JPython have been left behind by the recent changes.

WRT JPython, the list comprehensions have not yet been added. Then again, the feature was only recently checked in.

You raise a good point however. There are many compilers/parsers that have to be updated before we can claim that a feature is fully implemented.

[Thomas Wouters]

[(x, y) for y in something for x in somewhere if y in x]

The parentheses around the leftmost expression are mandatory. It's currently implemented something like this: L = [] x = [].append for y in something: for x in somewhere: if y in x: x((x, y)) del x

Thank you for the fine example. At least I now think that know what the feature is about.

regards, finn