mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-03 00:23:06 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

Replace the window() example with pairwise() which demonstrates tee().

Browse source
This commit is contained in:
Raymond Hettinger 2003-10-26 15:34:50 +00:00
parent f0c5aec85f
commit d591f666de
2 changed files with 14 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Doc/lib/libitertools.tex
View file

@ -405,15 +405,9 @@ def repeatfunc(func, times=None, *args):
else:
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
def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2, s3), ..."
a, b = tee(iterable)
return izip(a, islice(b, 1, None))
\end{verbatim}