[Python-3000] Change to class construction?

[Terry Reedy]

"Nick Coghlan" <ncoghlan at gmail.com> wrote in message 
news:468FA01A.6040707 at gmail.com...
| Georg is correct. A list comprehension like:
|
| [(x * y) for x in seq1 for y in seq2]
|
| expands to the following in 2.x (% prefixes the compiler's hidden
| variables):
|
|   %n = []
|   for x in seq1:
|     for y in seq2:
|       %n.append(x*y) # Special opcode, not a normal call
|
| In py3k it expands to:
|
|   def <anon>(outermost):
|     %0 = []
|     for x in outermost:
|       for y in seq2:
|         %0.append(x*y) # Special opcode, not a normal call
|     return %0
|   %n = <anon>(seq1)

Why not pass both seq1 *and* seq2 to the function so both become locals? 
The difference of treatment is quite surprising.