diff options
Diffstat (limited to 'Doc/library/itertools.rst')
| -rw-r--r-- | Doc/library/itertools.rst | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index ca2b1ff..1b5ff81 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -204,21 +204,13 @@ loops that truncate the stream. .. function:: imap(function, *iterables) Make an iterator that computes the function using arguments from each of the - iterables. If *function* is set to ``None``, then :func:`imap` returns the - arguments as a tuple. Like :func:`map` but stops when the shortest iterable is - exhausted instead of filling in ``None`` for shorter iterables. The reason for - the difference is that infinite iterator arguments are typically an error for - :func:`map` (because the output is fully evaluated) but represent a common and - useful way of supplying arguments to :func:`imap`. Equivalent to:: + iterables. Equivalent to:: def imap(function, *iterables): - iterables = map(iter, iterables) + iterables = [iter(it) for it in iterables) while True: - args = [next(i) for i in iterables] - if function is None: - yield tuple(args) - else: - yield function(*args) + args = [next(it) for it in iterables] + yield function(*args) .. function:: islice(iterable, [start,] stop [, step]) |