[Python-checkins] python/dist/src/Lib/test test_itertools.py, 1.23, 1.24

[rhettinger at users.sourceforge.net]

Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1:/tmp/cvs-serv16102/Lib/test

Modified Files:
	test_itertools.py 
Log Message:
Replace the window() example with pairwise() which demonstrates tee().



Index: test_itertools.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_itertools.py,v
retrieving revision 1.23
retrieving revision 1.24
diff -C2 -d -r1.23 -r1.24
*** test_itertools.py	26 Oct 2003 14:25:56 -0000	1.23
--- test_itertools.py	26 Oct 2003 15:34:50 -0000	1.24
***************
*** 624,637 ****
  ...         return starmap(func, repeat(args, times))
  
! >>> def window(seq, n=2):
! ...     "Returns a sliding window (of width n) over data from the iterable"
! ...     "   s -> (s0,s1,...s[n-1]), (s1,s2,...,sn), ...                   "
! ...     it = iter(seq)
! ...     result = tuple(islice(it, n))
! ...     if len(result) == n:
! ...         yield result
! ...     for elem in it:
! ...         result = result[1:] + (elem,)
! ...         yield result
  
  This is not part of the examples but it tests to make sure the definitions
--- 624,631 ----
  ...         return starmap(func, repeat(args, times))
  
! >>> def pairwise(iterable):
! ...     "s -> (s0,s1), (s1,s2), (s2, s3), ..."
! ...     a, b = tee(iterable)
! ...     return izip(a, islice(b, 1, None))
  
  This is not part of the examples but it tests to make sure the definitions
***************
*** 682,689 ****
  [0, 0, 0, 0, 0]
  
! >>> list(window('abc'))
! [('a', 'b'), ('b', 'c')]
  
! >>> list(window('abc',5))
  []
  
--- 676,686 ----
  [0, 0, 0, 0, 0]
  
! >>> list(pairwise('abcd'))
! [('a', 'b'), ('b', 'c'), ('c', 'd')]
  
! >>> list(pairwise([]))
! []
! 
! >>> list(pairwise('a'))
  []