classification
Title: feature request: a conditional "for" statement
Type: enhancement Stage:
Components: Interpreter Core Versions: Python 3.0, Python 2.4, Python 3.1, Python 2.7, Python 2.6, Python 2.5
process
Status: closed Resolution: rejected
Dependencies: Superseder:
Assigned To: Nosy List: zero79
Priority: normal Keywords:

Created on 2009-04-23 22:10 by zero79, last changed 2009-04-23 22:20 by zero79. This issue is now closed.

Messages (3)
msg86377 - (view) Author: Michael Gilbert (zero79) Date: 2009-04-23 22:10
hello, i've recently been working on some code where i am processing a 
list, but excluding certain items.  the solution is to use a list 
comprehension in the for statement, which for example looks like:

  for m in [n for n in range( 0 , 5 ) if n != 2]

determining what's going on here isn't immediately obvious (i.e. what's 
this new variable n doing?).  it would be nice to have a more 
streamlined syntax such as:

  for m in range( 0 , 5 ) with m != 2

which is much cleaner and obvious.  the statements following "with" 
could be any conditional expression.

this is just a wishlist item, and i understand that it wouldn't have 
much priority in the grand scheme of things.  thank you for your 
consideration.
msg86378 - (view) Author: Benjamin Peterson (benjamin.peterson) * (Python committer) Date: 2009-04-23 22:19
You should bring this up on the python-ideas mailing list. I'm closing
this unless it gets support on that list or python-dev.
msg86379 - (view) Author: Michael Gilbert (zero79) Date: 2009-04-23 22:20
hello, i've recently been working on some code where i am processing a 
list, but excluding certain items.  the solution is to use a list 
comprehension in the for statement, which for example looks like:

  for m in [n for n in range( 0 , 5 ) if n != 2]

determining what's going on here isn't immediately obvious (i.e. what's 
this new variable n doing?).  it would be nice to have a more 
streamlined syntax such as:

  for m in range( 0 , 5 ) with m != 2

which is much cleaner and obvious.  the statements following "with" 
could be any conditional expression.

this is just a wishlist item, and i understand that it wouldn't have 
much priority in the grand scheme of things.  thank you for your 
consideration.
History
Date User Action Args
2009-04-23 22:20:24zero79setnosy: - benjamin.peterson
messages: + msg86379
2009-04-23 22:19:30benjamin.petersonsetstatus: open -> closed

nosy: + benjamin.peterson
messages: + msg86378

resolution: rejected
2009-04-23 22:10:03zero79create