[Python-checkins] CVS: python/nondist/peps pep-0202.txt,1.3,1.4

2000年7月27日 13:13:42 -0700

Update of /cvsroot/python/python/nondist/peps
In directory slayer.i.sourceforge.net:/tmp/cvs-serv17584
Modified Files:
	pep-0202.txt 
Log Message:
BDFL pronouncements.
Got rid of ^L.
Index: pep-0202.txt
===================================================================
RCS file: /cvsroot/python/python/nondist/peps/pep-0202.txt,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -r1.3 -r1.4
*** pep-0202.txt	2000年07月25日 15:07:28	1.3
--- pep-0202.txt	2000年07月27日 20:13:39	1.4
***************
*** 6,10 ****
 Status: Incomplete

! 
 Introduction

--- 6,10 ----
 Status: Incomplete

! 
 Introduction

***************
*** 12,17 ****
 comprehensions. 

- 
 The Proposed Solution

--- 12,17 ----
 comprehensions. 

+ 

 The Proposed Solution

***************
*** 20,25 ****
 statements nest now.

- 
 Rationale

--- 20,25 ----
 statements nest now.

+ 

 Rationale

***************
*** 28,32 ****
 be used.

! 
 Examples

--- 28,32 ----
 be used.

! 
 Examples

***************
*** 39,53 ****
 >>> nums = [1,2,3,4]
 >>> fruit = ["Apples", "Peaches", "Pears", "Bananas"]
! >>> print [i,f for i in nums for f in fruit]
 [(1, 'Apples'), (1, 'Peaches'), (1, 'Pears'), (1, 'Bananas'),
 (2, 'Apples'), (2, 'Peaches'), (2, 'Pears'), (2, 'Bananas'),
 (3, 'Apples'), (3, 'Peaches'), (3, 'Pears'), (3, 'Bananas'),
 (4, 'Apples'), (4, 'Peaches'), (4, 'Pears'), (4, 'Bananas')]
! >>> print [i,f for i in nums for f in fruit if f[0] == "P"]
 [(1, 'Peaches'), (1, 'Pears'),
 (2, 'Peaches'), (2, 'Pears'),
 (3, 'Peaches'), (3, 'Pears'),
 (4, 'Peaches'), (4, 'Pears')]
! >>> print [i,f for i in nums for f in fruit if f[0] == "P" if i%2 == 1]
 [(1, 'Peaches'), (1, 'Pears'), (3, 'Peaches'), (3, 'Pears')]
 >>> def zip(*args):
--- 39,53 ----
 >>> nums = [1,2,3,4]
 >>> fruit = ["Apples", "Peaches", "Pears", "Bananas"]
! >>> print [(i,f) for i in nums for f in fruit]
 [(1, 'Apples'), (1, 'Peaches'), (1, 'Pears'), (1, 'Bananas'),
 (2, 'Apples'), (2, 'Peaches'), (2, 'Pears'), (2, 'Bananas'),
 (3, 'Apples'), (3, 'Peaches'), (3, 'Pears'), (3, 'Bananas'),
 (4, 'Apples'), (4, 'Peaches'), (4, 'Pears'), (4, 'Bananas')]
! >>> print [(i,f) for i in nums for f in fruit if f[0] == "P"]
 [(1, 'Peaches'), (1, 'Pears'),
 (2, 'Peaches'), (2, 'Pears'),
 (3, 'Peaches'), (3, 'Pears'),
 (4, 'Peaches'), (4, 'Pears')]
! >>> print [(i,f) for i in nums for f in fruit if f[0] == "P" if i%2 == 1]
 [(1, 'Peaches'), (1, 'Pears'), (3, 'Peaches'), (3, 'Pears')]
 >>> def zip(*args):
***************
*** 56,61 ****
 >>> print [i for i in zip(nums,fruit) if i[0]%2==0]
 [(2, 'Peaches'), (4, 'Bananas')]

- 
 Reference Implementation

--- 56,61 ----
 >>> print [i for i in zip(nums,fruit) if i[0]%2==0]
 [(2, 'Peaches'), (4, 'Bananas')]
+ 

 Reference Implementation

***************
*** 66,71 ****
 for a patch that adds list comprehensions to Python.

! 
 Open Issues

--- 66,84 ----
 for a patch that adds list comprehensions to Python.

+ 
+ BDFL Pronouncements

! Note: the BDFL refers to Guido van Rossum, Python's Benevolent
! Dictator For Life.
! 
! - The syntax proposed above is the Right One.
! 
! - The form [x, y for ...] should be disallowed; one should be
! required to write [(x, y) for ...].
! 
! - The form [... for x... for y...] nests, with the last index
! varying fastest, just like nested for loops.
! 
! 
 Open Issues

***************
*** 113,118 ****
 is. It has not had a lot of exercise, though the patch does include
 a few test cases.

- 
 Local Variables:
 mode: indented-text
--- 126,131 ----
 is. It has not had a lot of exercise, though the patch does include
 a few test cases.
+ 

 Local Variables:
 mode: indented-text