Jan Christoph added the comment:
Updated example with reversed variable order for reference. This really seems
to be related to issue3692, but really not the same thing.
IMHO both `a` and `b` should be passed in a situation like this:
a = range(5)
b = range(3)
c = [x+y for x in a for y
Jan Christoph added the comment:
Okay, so we're a in another scope inside the dictionary comprehension (all
comprehensions for that matter), and only one symbol is passed to the inside.
That's why `strange_reversed_working = {x+s.replace('(+/-)',''):None for x in
infts.split(', ') for s in
Jan Christoph added the comment:
But the simpler dictionary compprehension `{s.replace('(+/-)',''):None for s in
infts.split(', ')}` works perfectly. Shouldn't that also give the error if it
was a scope issue?
--
___
Python tracker
Serhiy Storchaka added the comment:
This looks like a duplicate of issue3692.
--
nosy: +serhiy.storchaka
resolution: -> duplicate
stage: -> resolved
status: open -> closed
superseder: -> improper scope in list comprehension, when used in class
declaration
Karthikeyan Singaravelan added the comment:
I think this is explained in the below answers with example that the left most
loop in the comprehension has access to the class variables which the nested
comprehensions don't have
https://stackoverflow.com/a/22692274/2610955
New submission from Jan Christoph :
The python code:
```
class _tri(object):
infts = '(+/-)inf, (+/-)infty, (+/-)infinity'
strange_failing = {x+s.replace('(+/-)',''):None for x in ('+','-','') for s
in infts.split(', ')}
```
gives a `global name 'infts' is not defined` exception,
