Initial.

SylvyKernel/__init__.py

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+from .kernel import SylvyKernel

SylvyKernel/__main__.py

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+from SylvyKernel.kernel import SylvyKernel
+
+if __name__ == "__main__":
+    SylvyKernel.run_as_main()

SylvyKernel/kernel.py

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+import sys
+import time
+
+import requests
+
+from metakernel import MetaKernel
+
+class EngineError(Exception):
+  pass
+
+class Engine:
+  API_URL = 'https://sylv.txlyre.website/api'
+
+  def __init__(self):
+    resp = requests.get(
+      f'{Engine.API_URL}/new'
+    ).json()
+
+    self.uid = resp['data']['session_uid']
+
+  def api(self, method, **data):
+    data['session_uid'] = self.uid
+
+    resp = requests.post(
+      f'{Engine.API_URL}/{method}',
+      json=data
+    ).json()
+
+    if resp['status'] != 'ok':
+      raise EngineError(resp['message'])
+
+    return resp['data']
+
+class Latex(object):
+  def __init__(self, text):
+    self.text = text
+
+  def _repr_latex_(self):
+    return f'$$\n{self.text}\n$$'
+
+class SVG(object):
+  def __init__(self, text):
+    self.text = text
+
+  def _repr_svg_(self):
+    return self.text
+
+class SylvyKernel(MetaKernel):
+  implementation = 'sylvy'
+  implementation_version = '0.1'
+  language = 'sylvy'
+  language_version = 'beta-alef'
+  banner = 'Sylvy CAS.'
+  language_info = {
+    'name': 'sylvy',
+    'mimetype': 'text/x-sylvy',
+    'codemirror_mode': {
+      'name': 'r'
+    },
+    'pygments_lexer': 'r'
+  }
+  kernel_json = {
+    "argv": [sys.executable, "-m", "SylvyKernel", "-f", "{connection_file}"],
+    "display_name": "Sylvy CAS",
+    "language": "sylvy",
+    "name": "SylvyKernel",
+  }
+
+  _engine = None
+
+  def do_shutdown(self, restart):
+    if self._engine:
+      self._engine.api('discard')
+
+      self._engine = None
+
+  def do_execute_direct(self, code):
+    if not code.strip():
+      return
+
+    if not self._engine:
+      self._engine = Engine()
+
+    data = self._engine.api(
+      'compute',
+      program=code
+    )
+
+    task_uid = data['task_uid']
+
+    result = None
+    while True:
+      data = self._engine.api(
+        'results'
+      )
+
+      if data['count']:
+        result = data['results'][0]
+
+        break
+
+      time.sleep(0.5)
+
+    if result:
+      if result['status'] == 'ERROR':
+        self.Error(result['stdout'])
+
+        return
+      elif result['status'] == 'TIMEOUT':
+        self.Error('Execution timed out.')
+
+        return
+
+      if result['stdout'].strip():
+        self.Print(result['stdout'])
+
+      self.Display(Latex(result['output']))
+
+      if result['plots']:
+        for plot_id in result['plots']:
+          plot = self._engine.api(
+            'plot',
+            plot_id=plot_id
+          )
+
+          self.Display(SVG(plot['svg']))

setup.py

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+from setuptools import setup
+
+setup(
+  name='SylvyKernel',
+  version='0.0.1',
+  author='txlyre',
+  author_email='[email protected]',
+  packages=['SylvyKernel'],
+  url='https://txlyre.website',
+  description='Jupyter kernel for Sylvy CAS.',
+  install_requires=[
+    'metakernel',
+    'requests'
+  ],
+)