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Backport PR #5535: fix n^2 performance issue in coalesce_streams preprocessor...
Backport PR #5535: fix n^2 performance issue in coalesce_streams preprocessor for n consecutive stream outputs, `\r` fix would be compiled n times, and applied to each ith output (n-i) times. - move pattern to module level - apply replacement after coalescing outputs An example notebook from nbviewer with ~1k outputs that was taking 90 seconds to render now takes 3 seconds.

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r16235:bceec0c0
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nbbase.py
73 lines | 1.9 KiB | text/x-python | PythonLexer
"""The basic dict based notebook 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 pprint
import uuid
from IPython.utils.ipstruct import Struct
from IPython.utils.py3compat import unicode_type
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
class NotebookNode(Struct):
pass
def from_dict(d):
if isinstance(d, dict):
newd = NotebookNode()
for k,v in d.items():
newd[k] = from_dict(v)
return newd
elif isinstance(d, (tuple, list)):
return [from_dict(i) for i in d]
else:
return d
def new_code_cell(code=None, prompt_number=None):
"""Create a new code cell with input and output"""
cell = NotebookNode()
cell.cell_type = u'code'
if code is not None:
cell.code = unicode_type(code)
if prompt_number is not None:
cell.prompt_number = int(prompt_number)
return cell
def new_text_cell(text=None):
"""Create a new text cell."""
cell = NotebookNode()
if text is not None:
cell.text = unicode_type(text)
cell.cell_type = u'text'
return cell
def new_notebook(cells=None):
"""Create a notebook by name, id and a list of worksheets."""
nb = NotebookNode()
if cells is not None:
nb.cells = cells
else:
nb.cells = []
return nb