Mix lambda and list comprehension?

[Peter Barth]

Hi,
trying to mix lambda expresions and list comprehension 
doesn't seem to work.
---
>>> [lambda x:x+y for y in range(10)][9](2)
11
>>> [lambda x:x+y for y in range(10)][4](2)
11
---
I expected the second expression to return 6.
What did I do wrong? Any hints?
Thanks
- Peter