[Piglit] [PATCH 2/4] framework/log.py: Make self.__summary keys explicitly

[Ilia Mirkin]

On Mon, Feb 17, 2014 at 3:39 PM, Dylan Baker <baker.dylan.c at gmail.com> wrote:
> I didn't think that list comprehensions leaked, since they're supposed to be
> usable anywhere map() and filter() is used without any additional side
> effects. Maybe I'm wrong though.

Python 2.7.5 (default, Oct 27 2013, 05:36:27)
[GCC 4.7.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> [x for x in xrange(10)]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> x
9
>>> (y for y in xrange(10))
<generator object <genexpr> at 0x7ff5c3ddc910>
>>> y
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'y' is not defined

It's one of those warts of the language. They couldn't remove the
leaking (until python3) because some programs had grown to implicitly
rely on that.

Here's a fun one:

res = [(lambda: x) for x in xrange(10)]
for r in res:
  print r()

  -ilia