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53 lines
1.4 KiB
53 lines
1.4 KiB
5 years ago
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"""
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This module is designed to be used as follows::
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from future.builtins.iterators import *
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And then, for example::
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for i in range(10**15):
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pass
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for (a, b) in zip(range(10**15), range(-10**15, 0)):
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pass
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Note that this is standard Python 3 code, plus some imports that do
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nothing on Python 3.
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The iterators this brings in are::
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- ``range``
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- ``filter``
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- ``map``
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- ``zip``
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On Python 2, ``range`` is a pure-Python backport of Python 3's ``range``
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iterator with slicing support. The other iterators (``filter``, ``map``,
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``zip``) are from the ``itertools`` module on Python 2. On Python 3 these
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are available in the module namespace but not exported for * imports via
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__all__ (zero no namespace pollution).
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Note that these are also available in the standard library
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``future_builtins`` module on Python 2 -- but not Python 3, so using
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the standard library version is not portable, nor anywhere near complete.
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"""
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from __future__ import division, absolute_import, print_function
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import itertools
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from future import utils
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if not utils.PY3:
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filter = itertools.ifilter
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map = itertools.imap
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from future.types import newrange as range
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zip = itertools.izip
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__all__ = ['filter', 'map', 'range', 'zip']
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else:
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import builtins
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filter = builtins.filter
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map = builtins.map
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range = builtins.range
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zip = builtins.zip
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__all__ = []
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