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        "author": "Ram Rachum",
        "author_email": "ram@rachum.com",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 3 - Alpha",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: MIT License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3.3",
            "Programming Language :: Python :: 3.4",
            "Topic :: Software Development :: Libraries :: Python Modules",
            "Topic :: Utilities"
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        "description": "Combi is a Pythonic package for `combinatorics`_.\n\nCombi lets you explore spaces of `permutations`_ and `combinations`_ as if they\nwere Python sequences, but without generating all the permutations/combinations\nin advance. It lets you specify a lot of special conditions on these spaces. It\nalso provides a few more classes that might be useful in combinatorics\nprogramming.\n\nCombi documentation: https://combi.readthedocs.org/en/stable/\n\nCombi on GitHub: https://github.com/cool-RR/combi\n\nCombi on PyPI: https://pypi.python.org/pypi/combi\n\nChangelog: https://combi.readthedocs.org/en/stable/changelog.html\n\nBasic usage\n===========\n\nUse `PermSpace`_ to create a permutation space:\n\n.. code:: python\n\n   >>> from combi import *\n   >>> perm_space = PermSpace('meow')\n   \nIt behaves like a sequence:\n\n.. code:: python\n\n   >>> len(perm_space)\n   24\n   >>> perm_space[7]\n   <Perm: ('e', 'm', 'w', 'o')>\n   >>> perm_space.index('mowe')\n   3\n   \nAnd yet the permutations are created on-demand rather than in advance.\n\nUse `CombSpace`_ to create a combination space, where order doesn't\nmatter:\n\n.. code:: python\n\n   >>> comb_space = CombSpace(('vanilla', 'chocolate', 'strawberry'), 2)\n   >>> comb_space\n   <CombSpace: ('vanilla', 'chocolate', 'strawberry'), n_elements=2>\n   >>> comb_space[2]\n   <Comb, n_elements=2: ('chocolate', 'strawberry')>\n   >>> len(comb_space)\n   3\n\nFor more details, `try the tutorial`_ or see the `documentation contents`_.\n\nFeatures\n========\n\n- `PermSpace`_ lets you explore a space of permutations as if it was a\n  Python sequence.\n  \n  * Permutations are generated on-demand, so huge permutation spaces can be \n    created easily without big memory footprint.\n  * `PermSpace`_ will notice if you have repeating elements in your sequence, \n    and treat all occurences of the same value as interchangable rather than \n    create redundant permutations.\n  * A custom domain can be specified instead of just using index numbers.\n  * You may specify some elements to be fixed, so they'll point to the same\n    value in all permutations. (Useful for limiting an experiment to a subset \n    of the original permutation space.)\n  * Permutation spaces may be limited to a certain degree of permutations. (A\n    permutation's degree is the number of transformations it takes to make it.)\n  * `k-permutations`_ are supported.\n  * You may specify a custom type for the generated permutations, so you could \n    implement your own functionality on them.\n    \n- `CombSpace`_ lets you explore a space of combinations as if it was a\n  Python sequence.\n  \n- `MapSpace`_ is like Python's built-in `map`_, except it's a\n  sequence that allows index access.\n  \n- `ProductSpace`_ is like Python's `itertools.product`_, except\n  it's a sequence that allows index access.\n  \n- `ChainSpace`_ is like Python's `itertools.chain`_, except\n  it's a sequence that allows index access.\n  \n- `SelectionSpace`_ is a space of all selections from a sequence, of all\n  possible lengths.\n  \n- The `Bag`_ class is a multiset like Python's `collections.Counter`_, except \n  it offers far more functionality, like more `arithmetic operations between \n  bags`_, `comparison between bags`_, and more. (It can do that because unlike \n  Python's `collections.Counter`_, it only allows natural numbers as keys.)\n  \n- Classes `FrozenBag`_, `OrderedBag`_ and `FrozenOrderedBag`_ are provided, \n  which are variations on `Bag`_.\n\n\nRequirements\n============\n\n* Python, version 2.6, 2.7 or 3.3 or above. If you're new to Python, `download\n  the newest version from here <http://python.org/download>`_.\n \n* `Setuptools`_.\n\n\nInstallation\n============\n\nUse `pip`_ to install Combi:\n\n.. code:: bash\n\n   $ pip install combi\n\n\nCommunity\n=========\n\nCombi on GitHub: https://github.com/cool-RR/combi Feel free to fork and send\npull requests!\n\nThere are three Combi groups, a.k.a. mailing lists:\n\n- If you need help with Combi, post a message on `the combi-users\n  Google Group <https://groups.google.com/forum/#!forum/combi-users>`_.\n\n- If you want to help on the development of Combi itself, come say\n  hello on `the combi-dev Google Group\n  <https://groups.google.com/forum/#!forum/combi-dev>`_.\n\n- If you want to be informed on new releases of Combi, sign up for\n  `the low-traffic combi-announce Google Group\n  <https://groups.google.com/forum/#!forum/combi-announce>`_.\n\n\n------------------------------------------------\n\nCombi was created by Ram Rachum. I provide\n`Development services in Python and Django <https://chipmunkdev.com>`_.\n\n\n.. _mailing list: https://groups.google.com/forum/#!forum/combi-users\n.. _combinatorics: https://en.wikipedia.org/wiki/Combinatorics\n.. _permutations: https://en.wikipedia.org/wiki/Permutation\n.. _k-permutations: https://en.wikipedia.org/wiki/Permutation#k-permutations_of_n\n.. _combinations: https://en.wikipedia.org/wiki/Combination\n.. _Setuptools: https://pypi.python.org/pypi/setuptools\n.. _pip: https://pypi.python.org/pypi/pip\n\n.. _PermSpace: https://combi.readthedocs.org/en/latest/perm_space_and_perm.html#permspace\n.. _CombSpace: https://combi.readthedocs.org/en/latest/comb_space_and_comb.html#combspace\n.. _MapSpace: https://combi.readthedocs.org/en/latest/other_classes.html#mapspace\n.. _ProductSpace: https://combi.readthedocs.org/en/latest/other_classes.html#productspace\n.. _ChainSpace: https://combi.readthedocs.org/en/latest/other_classes.html#chainspace\n.. _SelectionSpace: https://combi.readthedocs.org/en/latest/other_classes.html#selectionspace\n.. _Bag: https://combi.readthedocs.org/en/latest/bags.html#bag\n.. _FrozenBag: https://combi.readthedocs.org/en/latest/bags.html#frozenbag\n.. _OrderedBag: https://combi.readthedocs.org/en/latest/bags.html#orderedbag\n.. _FrozenOrderedBag: https://combi.readthedocs.org/en/latest/bags.html#frozenorderedbag\n.. _collections.Counter: https://docs.python.org/3/library/collections.html#collections.Counter\n.. _try the tutorial: https://combi.readthedocs.org/en/latest/intro.html\n.. _documentation contents: https://combi.readthedocs.org/en/latest/index.html\n.. _map: https://docs.python.org/3/library/functions.html#map\n.. _itertools.product: https://docs.python.org/3/library/itertools.html#itertools.product\n.. _itertools.chain: https://docs.python.org/3/library/itertools.html#itertools.chain\n.. _arithmetic operations between bags: https://combi.readthedocs.org/en/latest/bags.html#bags-operations\n.. _comparison between bags: https://combi.readthedocs.org/en/latest/bags.html#bags-comparisons",
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