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Work around a bug in setting and getting the mtime in python 2...
Work around a bug in setting and getting the mtime in python 2 See http://bugs.python.org/issue12904. Basically, we can get the mtime in nanosecond precision, but only set it in microsecond precision. This means that the shutil.copy2 will not set the destination's mtime to exactly the same mtime as our source. The end result is that we can *always* end up copying the extension because the source always appears newer. We add a microsecond of fudge time when checking to see if the source is newer than the destination to get around this. This bug is fixed in Python 3.3+, I believe.

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r4609:a661b7c0
r20080:52d92404
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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