93 lines
2.7 KiB
Plaintext
93 lines
2.7 KiB
Plaintext
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from __future__ import print_function
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from metakernel import MetaKernel
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from metakernel import register_ipython_magics
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register_ipython_magics()
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class MetaKernelyap(MetaKernel):
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implementation = 'MetaKernel YAP'
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implementation_version = '1.0'
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language = 'text'
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language_version = '0.1'
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banner = "MetaKernel YAP"
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language_info = {
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'mimetype': 'text/plain',
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'name': 'text',
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# ------ If different from 'language':
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'codemirror_mode': {
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"version": 2,
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"name": "prolog"
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}
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'pygments_lexer': 'language',
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'version' : "0.0.1",
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'file_extension': '.yap',
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'help_links': MetaKernel.help_links,
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}
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def __init__(self, **kwargs):
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MetaKernel.__init__(self, **kwargs)
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self._start_yap()
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self.qq = None sq
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def _start_yap(self):
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# Signal handlers are inherited by forked processes, and we can't easily
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# reset it from the subprocess. Since kernelapp ignores SIGINT except in
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# message handlers, we need to temporarily reset the SIGINT handler here
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# so that yap and its children are interruptible.
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sig = signal.signal(signal.SIGINT, signal.SIG_DFL)
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try:
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engine = yap.YAPEngine()
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engine.query("load_files(library(python), [])").command()
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banner = "YAP {0} Kernel".format(self.engine.version())
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finally:
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signal.signal(signal.SIGINT, sig)
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# Register Yap function to write image data to temporary file
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#self.yapwrapper.run_command(image_setup_cmd)
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def get_usage(self):
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return "This is the YAP kernel."
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def do_execute_direct(self, code):
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if not code.strip():
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return {'status': 'ok', 'execution_count': self.execution_count,
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'payload': [], 'user_expressions': {}}
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interrupted = False
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try:
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print self.q
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if self.q is None:
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self.q = self.engine.query(code.rstrip())
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if self.q.next():
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vs = self.q.namedVars()
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if vs.length() > 0:
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l = []
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while vs.length() > 0:
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eq = vs.car()
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l.append(' '.join([getArg(1).text(), '=', eq.getArg(2).text())
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vs = vs.cdr()
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l.append(';')
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o = '\n'.join(l)
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else:
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return 'yes'
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self.q = None
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else:
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return 'no'
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self.q = None
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def repr(self, data):
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return repr(data)
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if __name__ == '__main__':
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try:
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from ipykernel.kernelapp import IPKernelApp
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except ImportError:
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from IPython.kernel.zmq.kernelapp import IPKernelApp
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IPKernelApp.launch_instance(kernel_class=MetaKernelyap)
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