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"""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
#-----------------------------------------------------------------------------
import copy
import json
from .nbbase import from_dict
from .rwbase import (
NotebookReader, NotebookWriter, restore_bytes, rejoin_lines, split_lines
)
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
class BytesEncoder(json.JSONEncoder):
"""A JSON encoder that accepts b64 (and other *ascii*) bytestrings."""
def default(self, obj):
if isinstance(obj, bytes):
return obj.decode('ascii')
return json.JSONEncoder.default(self, obj)
class JSONReader(NotebookReader):
def reads(self, s, **kwargs):
nb = json.loads(s, **kwargs)
nb = self.to_notebook(nb, **kwargs)
return nb
def to_notebook(self, d, **kwargs):
return restore_bytes(rejoin_lines(from_dict(d)))
class JSONWriter(NotebookWriter):
def writes(self, nb, **kwargs):
kwargs['cls'] = BytesEncoder
kwargs['indent'] = 1
kwargs['sort_keys'] = True
if kwargs.pop('split_lines', True):
nb = split_lines(copy.deepcopy(nb))
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
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