166 lines
5.7 KiB
Python
166 lines
5.7 KiB
Python
"""Base classes and utilities for readers and writers.
|
|
|
|
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 pprint
|
|
|
|
from ipython_genutils.py3compat import str_to_bytes
|
|
from .._compat import encodebytes, decodebytes
|
|
|
|
#-----------------------------------------------------------------------------
|
|
# Code
|
|
#-----------------------------------------------------------------------------
|
|
|
|
def restore_bytes(nb):
|
|
"""Restore bytes of image data from unicode-only formats.
|
|
|
|
Base64 encoding is handled elsewhere. Bytes objects in the notebook are
|
|
always b64-encoded. We DO NOT encode/decode around file formats.
|
|
"""
|
|
for ws in nb.worksheets:
|
|
for cell in ws.cells:
|
|
if cell.cell_type == 'code':
|
|
for output in cell.outputs:
|
|
if 'png' in output:
|
|
output.png = str_to_bytes(output.png, 'ascii')
|
|
if 'jpeg' in output:
|
|
output.jpeg = str_to_bytes(output.jpeg, 'ascii')
|
|
return nb
|
|
|
|
# output keys that are likely to have multiline values
|
|
_multiline_outputs = ['text', 'html', 'svg', 'latex', 'javascript', 'json']
|
|
|
|
def rejoin_lines(nb):
|
|
"""rejoin multiline text into strings
|
|
|
|
For reversing effects of ``split_lines(nb)``.
|
|
|
|
This only rejoins lines that have been split, so if text objects were not split
|
|
they will pass through unchanged.
|
|
|
|
Used when reading JSON files that may have been passed through split_lines.
|
|
"""
|
|
for ws in nb.worksheets:
|
|
for cell in ws.cells:
|
|
if cell.cell_type == 'code':
|
|
if 'input' in cell and isinstance(cell.input, list):
|
|
cell.input = u'\n'.join(cell.input)
|
|
for output in cell.outputs:
|
|
for key in _multiline_outputs:
|
|
item = output.get(key, None)
|
|
if isinstance(item, list):
|
|
output[key] = u'\n'.join(item)
|
|
else: # text cell
|
|
for key in ['source', 'rendered']:
|
|
item = cell.get(key, None)
|
|
if isinstance(item, list):
|
|
cell[key] = u'\n'.join(item)
|
|
return nb
|
|
|
|
|
|
def split_lines(nb):
|
|
"""split likely multiline text into lists of strings
|
|
|
|
For file output more friendly to line-based VCS. ``rejoin_lines(nb)`` will
|
|
reverse the effects of ``split_lines(nb)``.
|
|
|
|
Used when writing JSON files.
|
|
"""
|
|
for ws in nb.worksheets:
|
|
for cell in ws.cells:
|
|
if cell.cell_type == 'code':
|
|
if 'input' in cell and isinstance(cell.input, str):
|
|
cell.input = cell.input.splitlines()
|
|
for output in cell.outputs:
|
|
for key in _multiline_outputs:
|
|
item = output.get(key, None)
|
|
if isinstance(item, str):
|
|
output[key] = item.splitlines()
|
|
else: # text cell
|
|
for key in ['source', 'rendered']:
|
|
item = cell.get(key, None)
|
|
if isinstance(item, str):
|
|
cell[key] = item.splitlines()
|
|
return nb
|
|
|
|
# b64 encode/decode are never actually used, because all bytes objects in
|
|
# the notebook are already b64-encoded, and we don't need/want to double-encode
|
|
|
|
def base64_decode(nb):
|
|
"""Restore all bytes objects in the notebook from base64-encoded strings.
|
|
|
|
Note: This is never used
|
|
"""
|
|
for ws in nb.worksheets:
|
|
for cell in ws.cells:
|
|
if cell.cell_type == 'code':
|
|
for output in cell.outputs:
|
|
if 'png' in output:
|
|
if isinstance(output.png, str):
|
|
output.png = output.png.encode('ascii')
|
|
output.png = decodebytes(output.png)
|
|
if 'jpeg' in output:
|
|
if isinstance(output.jpeg, str):
|
|
output.jpeg = output.jpeg.encode('ascii')
|
|
output.jpeg = decodebytes(output.jpeg)
|
|
return nb
|
|
|
|
|
|
def base64_encode(nb):
|
|
"""Base64 encode all bytes objects in the notebook.
|
|
|
|
These will be b64-encoded unicode strings
|
|
|
|
Note: This is never used
|
|
"""
|
|
for ws in nb.worksheets:
|
|
for cell in ws.cells:
|
|
if cell.cell_type == 'code':
|
|
for output in cell.outputs:
|
|
if 'png' in output:
|
|
output.png = encodebytes(output.png).decode('ascii')
|
|
if 'jpeg' in output:
|
|
output.jpeg = encodebytes(output.jpeg).decode('ascii')
|
|
return nb
|
|
|
|
|
|
class NotebookReader(object):
|
|
"""A class for reading notebooks."""
|
|
|
|
def reads(self, s, **kwargs):
|
|
"""Read a notebook from a string."""
|
|
raise NotImplementedError("loads must be implemented in a subclass")
|
|
|
|
def read(self, fp, **kwargs):
|
|
"""Read a notebook from a file like object"""
|
|
return self.read(fp.read(), **kwargs)
|
|
|
|
|
|
class NotebookWriter(object):
|
|
"""A class for writing notebooks."""
|
|
|
|
def writes(self, nb, **kwargs):
|
|
"""Write a notebook to a string."""
|
|
raise NotImplementedError("loads must be implemented in a subclass")
|
|
|
|
def write(self, nb, fp, **kwargs):
|
|
"""Write a notebook to a file like object"""
|
|
return fp.write(self.writes(nb,**kwargs))
|
|
|
|
|
|
|