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spot/wrap/python/tests/piperead.ipynb
Alexandre Duret-Lutz 961d005b84 python: read automata from pipes 
* src/hoaparse/hoaparse.yy, src/hoaparse/hoascan.ll,
src/hoaparse/parsedecl.hh, src/hoaparse/public.hh:
Add a way to read automata from a file descriptor.
* wrap/python/spot.py: Add machinery to read from
pipes.
* wrap/python/tests/piperead.ipynb: New file.
* wrap/python/tests/Makefile.am: Add it.
* wrap/python/tests/run.in: Setup PATH.
2015-03-30 21:57:04 +02:00

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"from IPython.display import display \n",
"import os\n",
"# Note that Spot (loaded by the kernel) will store a copy of\n",
"# the environment variables the first time it reads them, so\n",
"# if you change those variables, the new values will be ignored\n",
"# until you restart the kernel.\n",
"os.environ['SPOT_DOTEXTRA'] = 'size=\"10.2,5\" node[style=filled,fillcolor=\"#ffffaa\"] edge[arrowhead=vee, arrowsize=.7]'\n",
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"text": [
"<spot_impl.tgba_digraph; proxy of <Swig Object of type 'std::shared_ptr< spot::tgba_digraph > *' at 0x7f5b14173450> >"
]
}
],
"prompt_number": 3
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Error handling\n",
"\n",
"If the shell command terminates with a non-zero exit status, we should get an exception."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"spot.automaton('non-existing-command|')"
],
"language": "python",
"metadata": {},
"outputs": [
{
"ename": "RuntimeError",
"evalue": "Command non-existing-command exited with exit status 127",
"output_type": "pyerr",
"traceback": [
"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[1;31mRuntimeError\u001b[0m Traceback (most recent call last)",
"\u001b[1;32m<ipython-input-4-765c7cc6937f>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mspot\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mautomaton\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'non-existing-command|'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[1;32m/home-ssd/adl/git/spot/wrap/python/spot.py\u001b[0m in \u001b[0;36mautomaton\u001b[1;34m(filename)\u001b[0m\n\u001b[0;32m 157\u001b[0m See `spot.automata()` for a list of supported format.\"\"\"\n\u001b[0;32m 158\u001b[0m \u001b[1;32mtry\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m--> 159\u001b[1;33m \u001b[1;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m 160\u001b[0m \u001b[1;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 161\u001b[0m \u001b[1;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
"\u001b[1;32m/home-ssd/adl/git/spot/wrap/python/spot.py\u001b[0m in \u001b[0;36mautomata\u001b[1;34m(*filenames)\u001b[0m\n\u001b[0;32m 149\u001b[0m \u001b[1;32mif\u001b[0m \u001b[0mret\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 150\u001b[0m raise RuntimeError(\"Command {} exited with exit status {}\"\n\u001b[1;32m--> 151\u001b[1;33m .format(filename[:-1], ret))\n\u001b[0m\u001b[0;32m 152\u001b[0m \u001b[1;32mreturn\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 153\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
"\u001b[1;31mRuntimeError\u001b[0m: Command non-existing-command exited with exit status 127"
]
}
],
"prompt_number": 4
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"for a in spot.automata(\"ltl2tgba -H 'a U b'|\", 'ltl2tgba -f \"syntax U U error\"|'):\n",
" display(a)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "display_data",
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"text": [
"<spot_impl.tgba_digraph; proxy of <Swig Object of type 'std::shared_ptr< spot::tgba_digraph > *' at 0x7f5b141733f0> >"
]
},
{
"ename": "RuntimeError",
"evalue": "Command ltl2tgba -f \"syntax U U error\" exited with exit status 2",
"output_type": "pyerr",
"traceback": [
"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[1;31mRuntimeError\u001b[0m Traceback (most recent call last)",
"\u001b[1;32m<ipython-input-5-21a24ff75c32>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;32mfor\u001b[0m \u001b[0ma\u001b[0m \u001b[1;32min\u001b[0m \u001b[0mspot\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mautomata\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"ltl2tgba -H 'a U b'|\"\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;34m'ltl2tgba -f \"syntax U U error\"|'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m 2\u001b[0m \u001b[0mdisplay\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0ma\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
"\u001b[1;32m/home-ssd/adl/git/spot/wrap/python/spot.py\u001b[0m in \u001b[0;36mautomata\u001b[1;34m(*filenames)\u001b[0m\n\u001b[0;32m 149\u001b[0m \u001b[1;32mif\u001b[0m \u001b[0mret\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 150\u001b[0m raise RuntimeError(\"Command {} exited with exit status {}\"\n\u001b[1;32m--> 151\u001b[1;33m .format(filename[:-1], ret))\n\u001b[0m\u001b[0;32m 152\u001b[0m \u001b[1;32mreturn\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 153\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
"\u001b[1;31mRuntimeError\u001b[0m: Command ltl2tgba -f \"syntax U U error\" exited with exit status 2"
]
}
],
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},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Reading an empty file with `spot.automaton()` is an error."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"spot.automaton('true|')"
],
"language": "python",
"metadata": {},
"outputs": [
{
"ename": "RuntimeError",
"evalue": "Failed to read automaton from true|",
"output_type": "pyerr",
"traceback": [
"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
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"\u001b[1;31mStopIteration\u001b[0m: ",
"\nDuring handling of the above exception, another exception occurred:\n",
"\u001b[1;31mRuntimeError\u001b[0m Traceback (most recent call last)",
"\u001b[1;32m<ipython-input-6-f4e056a50029>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mspot\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mautomaton\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'true|'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[1;32m/home-ssd/adl/git/spot/wrap/python/spot.py\u001b[0m in \u001b[0;36mautomaton\u001b[1;34m(filename)\u001b[0m\n\u001b[0;32m 159\u001b[0m \u001b[1;32mreturn\u001b[0m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mautomata\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 160\u001b[0m \u001b[1;32mexcept\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m--> 161\u001b[1;33m \u001b[1;32mraise\u001b[0m \u001b[0mRuntimeError\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"Failed to read automaton from {}\"\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m 162\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 163\u001b[0m def translate(formula, output='tgba', pref='small', level='high',\n",
"\u001b[1;31mRuntimeError\u001b[0m: Failed to read automaton from true|"
]
}
],
"prompt_number": 6
}
],
"metadata": {}
}
]
}
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