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    "info": {
        "author": "Guenter Bartsch",
        "author_email": "guenter@zamia.org",
        "bugtrack_url": null,
        "classifiers": [
            "Intended Audience :: Developers",
            "Intended Audience :: Science/Research",
            "License :: OSI Approved :: Apache Software License",
            "Operating System :: MacOS :: MacOS X",
            "Operating System :: Microsoft :: Windows",
            "Operating System :: POSIX :: Linux",
            "Programming Language :: Prolog",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.6",
            "Topic :: Scientific/Engineering :: Artificial Intelligence",
            "Topic :: Software Development :: Libraries :: Python Modules"
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        "description": "py-xsb\n======\n\nA Python - XSB bridge enabling querying XSB in your Python programs. It\nfeatures a ctypes mapping of XSB\u2019s C-Interface as well as some higher\nlevel convenience wrappers.\n\nConstructive comments, patches and pull-requests are very welcome.\n\nExamples\n--------\n\n### High Level Wrappers (demo\\_highlevel.py)\n\nSetup XSB engine:\n\n    from pyxsb import pyxsb_start_session, pyxsb_end_session, pyxsb_command, \\\n                      pyxsb_query, XSBFunctor, XSBVariable, xsb_to_json, json_to_xsb\n\n    pyxsb_start_session()\n    # in case auto-detection fails, you can pass the XSB arch dir here like so:\n    # pyxsb_start_session('/opt/xsb-3.8.0/config/x86_64-redhat-linux-gnu')\n    #\n    # to determine the location of the XSB arch dir on your machine, run this query in XSB:\n    # xsb_configuration:xsb_configuration(config_dir,Dir).\n\nrun a string XSB command:\n\n    pyxsb_command('consult(ft).')\n\nrun a string query:\n\n    for row in pyxsb_query('label(X, L).'):\n        print u\"label of %s is %s\" % (row[0], row[1])\n\nqueries and commands can also be constructed structurally:\n\n    for row in pyxsb_query(XSBFunctor('descend', [XSBVariable('X'), XSBVariable('Y')])):\n        print u\"decendant of %s is %s\" % (row[0], row[1])\n\nthe wrappers (XSBFunctor, XSBVariable, XSBString, XSBAtom) are the same\nones used to represent the query results. For integers, floats and lists\nprimitive python types are used:\n\n    for row in pyxsb_query(u'A = 1, B = 0.5, C = \"hello\", D = yes, E = foo(bar), F = [1.1,2.2], G = \\'g\u00fcnter\\'.'):\n        for i, r in enumerate(row):\n            print u\"#%d: %-10s (type: %-20s, class: %-20s)\" % (i, r, type(r), r.__class__)\n\nthe wrappers can also converted to and from JSON:\n\n        js = xsb_to_json(row)\n        print \"json: %s\" % js\n\n        row2 = json_to_xsb(js)\n        print \"restored: %s\" % str(row2)\n\nclose the session:\n\n    pyxsb_end_session()\n\n### XSB Low Level API (demo\\_lowlevel.py)\n\nFirst, import xsb and init the library:\n\n    from pyxsb import pyxsb_start_session\n    pyxsb_start_session()\n\n    from pyxsb import *\n\nexecute an XSB command:\n\n    c2p_functor(\"consult\", 1, reg_term(1))\n    c2p_string(\"ctest\",p2p_arg(reg_term(1),1))\n    if xsb_command():\n        raise Exception (\"Error consulting ctest\")\n\nsame thing using the string interface:\n\n    if xsb_command_string(\"consult(basics).\"):\n        raise Exception (\"Error (string) consulting basics.\")\n\nrun a query:\n\n    # Create the query p(300,X,Y) and send it.\n    c2p_functor(\"p\",3,reg_term(1))\n    c2p_int(300,p2p_arg(reg_term(1),1))\n\n    rcode = xsb_query()\n\n    # Print out answer and retrieve next one.\n    while not rcode:\n        if not is_string(p2p_arg(reg_term(2),1)) and is_string(p2p_arg(reg_term(2),2)):\n            print \"2nd and 3rd subfields must be atoms\"\n        else:\n            print \"Answer: %d, %s(%s), %s(%s)\" % ( p2c_int(p2p_arg(reg_term(1),1)),\n                                                   p2c_string(p2p_arg(reg_term(1),2)),\n                                                   xsb_var_string(1),\n                                                   p2c_string(p2p_arg(reg_term(1),3)),\n                                                   xsb_var_string(2))\n        rcode = xsb_next()\n\nrun a string query:\n\n    xsb_make_vars(3)\n    xsb_set_var_int(300,1)\n    rcode = xsb_query_string(\"p(X,Y,Z).\")\n\n    # Print out answer and retrieve next one.\n    while not rcode:\n        if not is_string(p2p_arg(reg_term(2),2)) and is_string(p2p_arg(reg_term(2),3)):\n            print \"2nd and 3rd subfields must be atoms\"\n        else:\n            print \"Answer: %d, %s, %s\" % (xsb_var_int(1),\n                                          xsb_var_string(2),\n                                          xsb_var_string(3))\n        rcode = xsb_next()\n\nclose the connection:\n\n    pyxsb_end_session()\n\nInstallation Notes\n------------------\n\n`py-xsb` needs the XSB dynamic library to work: First, follow the\nstandard XSB build instructions:\n\n    tar xfvz XSB.tar.gz\n    cd XSB/build\n    ./configure\n    ./makexsb\n\nnow, in order to build `libxsb.so`, execute this command:\n\n    [guenter@dagobert build]$ ./makexsb dynmodule\n\nLinks\n-----\n\n-   <http://xsb.sourceforge.net/> [XSB]\n\nRequirements\n------------\n\n-   Python 2.7 or Python 3.6\n\n-   libxsb.so shared library installed and in ld\u2019s path\n\nLicense\n-------\n\nMy own code is Apache-2.0 licensed unless otherwise noted in the\nscript\u2019s copyright headers.\n\nAuthors\n-------\n\n-   Guenter Bartsch \\<<guenter@zamia.org>\\>\n\n-   Many improvements and bugfixes by Michael Kifer, Annie Liu, David\n    Warren (XSB team at Stony Brook University of New York)\n\n\n\n\n",
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        "keywords": "XSB interface AI artificial intelligence reasoning programming in logic",
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