mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-03 16:39:00 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

The previous made the stop argument optional.

Browse source 
It is better to be explicit and just allow stop to be None.
This commit is contained in:
Raymond Hettinger 2003-05-02 19:44:20 +00:00
parent 14ef54cd83
commit 341deb74e7
3 changed files with 10 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

17
Doc/lib/libitertools.tex
View file

@ -197,9 +197,9 @@ by functions or loops that truncate the stream.
If \var{start} is non-zero, then elements from the iterable are skipped
until start is reached. Afterward, elements are returned consecutively
unless \var{step} is set higher than one which results in items being
skipped. If \var{stop} is not specified or is \code{None}, then iteration
continues indefinitely; otherwise, it stops at the specified position.
Unlike regular slicing,
skipped. If \var{stop} is \code{None}, then iteration continues until
the iterator is exhausted, if at all; otherwise, it stops at the specified
position. Unlike regular slicing,
\function{islice()} does not support negative values for \var{start},
\var{stop}, or \var{step}. Can be used to extract related fields
from data where the internal structure has been flattened (for
@ -208,13 +208,10 @@ by functions or loops that truncate the stream.
\begin{verbatim}
def islice(iterable, *args):
if args:
s = slice(*args)
next = s.start or 0
stop = s.stop
step = s.step or 1
else:
next, stop, step = 0, None, 1
s = slice(*args)
next = s.start or 0
stop = s.stop
step = s.step or 1
for cnt, element in enumerate(iterable):
if cnt < next:
continue