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Shut down kernels in parallel...
Shut down kernels in parallel When stopping the notebook server, it currently sends a shutdown request to each kernel and then waits for the process to finish. This can be slow if you have several kernels running. This makes it issues all the shutdown requests before waiting on the processes, so shutdown happens in parallel. KernelManager (and MultiKernelManager) gain three new public API methods to allow this: * request_shutdown (promoted from a private method) * wait_shutdown (refactored out of shutdown_kernel) * cleanup (refactored out of shutdown_kernel)

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nbjson.py
54 lines | 1.5 KiB | text/x-python | PythonLexer
"""Read and write notebooks in JSON format.
Authors:
* Brian Granger
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2008-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from base64 import encodestring
from .rwbase import NotebookReader, NotebookWriter
from .nbbase import from_dict
import json
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
class JSONReader(NotebookReader):
def reads(self, s, **kwargs):
nb = json.loads(s, **kwargs)
return self.to_notebook(nb, **kwargs)
def to_notebook(self, d, **kwargs):
"""Convert from a raw JSON dict to a nested NotebookNode structure."""
return from_dict(d)
class JSONWriter(NotebookWriter):
def writes(self, nb, **kwargs):
kwargs['indent'] = 4
return json.dumps(nb, **kwargs)
_reader = JSONReader()
_writer = JSONWriter()
reads = _reader.reads
read = _reader.read
to_notebook = _reader.to_notebook
write = _writer.write
writes = _writer.writes