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from base64 import encodestring, decodestring
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def base64_decode(nb):
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"""Base64 encode all bytes objects in the notebook."""
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for ws in nb['worksheets']:
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for cell in ws['cells']:
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if cell['cell_type'] == 'code':
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if cell.get('image/png',''):
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cell['image/png'] = bytes(decodestring(cell['image/png']))
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return nb
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def base64_encode(nb):
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"""Base64 decode all binary objects in the notebook."""
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for ws in nb['worksheets']:
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for cell in ws['cells']:
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if cell['cell_type'] == 'code':
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if cell.get('image/png',''):
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cell['image/png'] = unicode(encodestring(cell['image/png']))
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return nb
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class NotebookReader(object):
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def reads(self, s, **kwargs):
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"""Read a notebook from a string."""
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raise NotImplementedError("loads must be implemented in a subclass")
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def read(self, fp, **kwargs):
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"""Read a notebook from a file like object"""
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return self.loads(fp.read(), **kwargs)
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class NotebookWriter(object):
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def writes(self, nb, **kwargs):
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"""Write a notebook to a string."""
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raise NotImplementedError("loads must be implemented in a subclass")
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def write(self, nb, fp, **kwargs):
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"""Write a notebook to a file like object"""
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return fp.write(self.dumps(nb,**kwargs))
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