Patches item #1548388, was opened at 2006-08-29 04:33
Message generated for change (Comment added) made by gvanrossum
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Category: Core (C code)
Group: Python 3000
Status: Open
Resolution: None
Priority: 5
Submitted By: Georg Brandl (gbrandl)
>Assigned to: Guido van Rossum (gvanrossum)
Summary: set comprehensions
Initial Comment:
This is a big one:
* cleanup grammar; unifies listcomp/genexp grammar
which means that [x for x in 1, 2] is no longer valid
* cleanup comprehension compiling code (unifies all AST
code for the three comprehensions and most of the
compile.c code)
* add set comprehensions
This patch modifies list comprehensions to be
implemented more like generator expressions: in a
separate function, which means that the loop variables
will not leak any more.
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>Comment By: Guido van Rossum (gvanrossum)
Date: 2006-08-29 13:59
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Nice!
I see failures in 4 tests:
test_compiler test_dis test_transformer test_univnewlines
test_univnewlines is trivial (it's deleting a variable
leaked out of a list comprehension); haven't looked at the
rest in detail
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Comment By: Georg Brandl (gbrandl)
Date: 2006-08-29 04:34
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The previously attached patch contains only the important
files. The FULL patch (attached now) also contains syntax
fixes in python files so that the test suite is mostly passing.
Note that the compiler package isn't ready yet.
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