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annotate env/lib/python3.7/site-packages/future/builtins/iterators.py @ 4:79f47841a781 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:47:39 -0400
parents 26e78fe6e8c4
children
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1 """
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2 This module is designed to be used as follows::
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3
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4 from future.builtins.iterators import *
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5
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6 And then, for example::
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7
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8 for i in range(10**15):
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9 pass
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10
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11 for (a, b) in zip(range(10**15), range(-10**15, 0)):
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12 pass
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13
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14 Note that this is standard Python 3 code, plus some imports that do
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15 nothing on Python 3.
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16
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17 The iterators this brings in are::
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18
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19 - ``range``
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20 - ``filter``
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21 - ``map``
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22 - ``zip``
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23
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24 On Python 2, ``range`` is a pure-Python backport of Python 3's ``range``
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25 iterator with slicing support. The other iterators (``filter``, ``map``,
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26 ``zip``) are from the ``itertools`` module on Python 2. On Python 3 these
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27 are available in the module namespace but not exported for * imports via
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28 __all__ (zero no namespace pollution).
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29
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30 Note that these are also available in the standard library
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31 ``future_builtins`` module on Python 2 -- but not Python 3, so using
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32 the standard library version is not portable, nor anywhere near complete.
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33 """
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34
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35 from __future__ import division, absolute_import, print_function
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36
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37 import itertools
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38 from future import utils
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39
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40 if not utils.PY3:
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41 filter = itertools.ifilter
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42 map = itertools.imap
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43 from future.types import newrange as range
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44 zip = itertools.izip
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45 __all__ = ['filter', 'map', 'range', 'zip']
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46 else:
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47 import builtins
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48 filter = builtins.filter
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49 map = builtins.map
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50 range = builtins.range
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51 zip = builtins.zip
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52 __all__ = []