Language Design: list_for scope?

[guthrie]

I'm pretty new to Python, and trying to parse the grammar.

Q: What is the scope of the testlist in a list_for?

For example;
Instead of;
      for x in [ x in dict if dict[x]=="thing" ]:
in this:
      for x in dict and dict[x]=="thing":
x is undefined.

And why doesn't this work:
	for x in dict if dict[x]=="thing":

Any insights/hints on why it is broken?

Thanks,
Gregory
----------------------------------------
http://docs.python.org/ref/grammar.txt:
list_for ::=
              "for" expression_list "in" testlist
               [list_iter]
testlist ::=
              test ( "," test )* [ "," ]
list_iter ::=
              list_for | list_if
list_if ::=
              "if" test [list_iter]


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