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kernel.py
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kernel.py
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"""
The Sage ZMQ Kernel
Version of the Jupyter kernel when running Sage inside the Jupyter
notebook or remote Jupyter sessions.
"""
#*****************************************************************************
# Copyright (C) 2015 Volker Braun <vbraun.name@gmail.com>
#
# Distributed under the terms of the GNU General Public License (GPL)
# as published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
# http://www.gnu.org/licenses/
#*****************************************************************************
import sys
from ipykernel.ipkernel import IPythonKernel
from ipykernel.zmqshell import ZMQInteractiveShell
from traitlets import Type
from sage.env import SAGE_VERSION
from sage.repl.interpreter import SageNotebookInteractiveShell
from sage.repl.ipython_extension import SageJupyterCustomizations
class SageZMQInteractiveShell(SageNotebookInteractiveShell, ZMQInteractiveShell):
pass
class SageKernel(IPythonKernel):
implementation = 'sage'
implementation_version = SAGE_VERSION
shell_class = Type(SageZMQInteractiveShell)
def __init__(self, **kwds):
"""
The Sage Jupyter Kernel
INPUT:
See the Jupyter documentation
EXAMPLES::
sage: from sage.repl.ipython_kernel.kernel import SageKernel
sage: SageKernel.__new__(SageKernel)
<sage.repl.ipython_kernel.kernel.SageKernel object at 0x...>
"""
super(SageKernel, self).__init__(**kwds)
SageJupyterCustomizations(self.shell)
@property
def banner(self):
r"""
The Sage Banner
The value of this property is displayed in the Jupyter
notebook.
OUTPUT:
String.
EXAMPLES::
sage: from sage.repl.ipython_kernel.kernel import SageKernel
sage: sk = SageKernel.__new__(SageKernel)
sage: sk.banner
'...SageMath version...'
"""
from sage.misc.banner import banner_text
return banner_text()
@property
def help_links(self):
r"""
Help in the Jupyter Notebook
OUTPUT:
See the Jupyter documentation.
.. NOTE::
Urls starting with "kernelspecs" are prepended by the
browser with the appropriate path.
EXAMPLES::
sage: from sage.repl.ipython_kernel.kernel import SageKernel
sage: sk = SageKernel.__new__(SageKernel)
sage: sk.help_links
[{'text': 'Sage Documentation',
'url': 'kernelspecs/sagemath/doc/index.html'},
...]
"""
from sage.repl.ipython_kernel.install import SageKernelSpec
identifier = SageKernelSpec.identifier()
kernel_url = lambda x: 'kernelspecs/{0}/{1}'.format(identifier, x)
return [
{
'text': 'Sage Documentation',
'url': kernel_url('doc/index.html'),
},
{
'text': 'Sage Tutorial',
'url': kernel_url('doc/tutorial/index.html'),
},
{
'text': 'Thematic Tutorials',
'url': kernel_url('doc/thematic_tutorials/index.html'),
},
{
'text': 'FAQs',
'url': kernel_url('doc/faq/index.html'),
},
{
'text': 'PREP Tutorials',
'url': kernel_url('doc/prep/index.html'),
},
{
'text': 'Sage Reference',
'url': kernel_url('doc/reference/index.html'),
},
{
'text': "Developer's Guide",
'url': kernel_url('doc/developer/index.html'),
},
{
'text': "Python",
'url': "http://docs.python.org/%i.%i" % sys.version_info[:2],
},
{
'text': "IPython",
'url': "http://ipython.org/documentation.html",
},
{
'text': 'Singular',
'url': 'http://www.singular.uni-kl.de/Manual/latest/index.htm',
},
{
'text': 'GAP',
'url': 'http://gap-system.org/Manuals/doc/ref/chap0.html',
},
{
'text': "NumPy",
'url': "http://docs.scipy.org/doc/numpy/reference/",
},
{
'text': "SciPy",
'url': "http://docs.scipy.org/doc/scipy/reference/",
},
{
'text': "SymPy",
'url': 'http://docs.sympy.org/latest/index.html',
},
{
'text': "Matplotlib",
'url': "https://matplotlib.org/contents.html",
},
{
'text': "Markdown",
'url': "http://help.github.com/articles/github-flavored-markdown",
},
]
def pre_handler_hook(self):
"""
Restore the signal handlers to their default values at Sage
startup, saving the old handler at the ``saved_sigint_handler``
attribute. This is needed because Jupyter needs to change the
``SIGINT`` handler.
See :trac:`19135`.
TESTS::
sage: from sage.repl.ipython_kernel.kernel import SageKernel
sage: k = SageKernel.__new__(SageKernel)
sage: k.pre_handler_hook()
sage: k.saved_sigint_handler
<cyfunction python_check_interrupt at ...>
"""
from cysignals import init_cysignals
self.saved_sigint_handler = init_cysignals()