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"""Base classes for the notebook conversion pipeline.
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This module defines Converter, from which all objects designed to implement
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a conversion of IPython notebooks to some other format should inherit.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (c) 2012, the IPython Development Team.
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#
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# Distributed under the terms of the Modified BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function, absolute_import
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# Stdlib imports
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import jinja2
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import codecs
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import io
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import logging
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import os
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import pprint
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import re
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from types import FunctionType
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from jinja2 import Environment, PackageLoader, FileSystemLoader
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env = Environment(loader=FileSystemLoader('./templates/'))
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# IPython imports
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from IPython.nbformat import current as nbformat
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from IPython.config.configurable import Configurable, SingletonConfigurable
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from IPython.utils.traitlets import (List, Unicode, Type, Bool, Dict, CaselessStrEnum,
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Any)
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# Our own imports
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from IPython.utils.text import indent
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from .utils import remove_ansi
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#-----------------------------------------------------------------------------
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# Class declarations
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#-----------------------------------------------------------------------------
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def rm_fake(strng):
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return strng.replace('/files/', '')
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class ConversionException(Exception):
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pass
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def python_comment(string):
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return '# '+'\n# '.join(string.split('\n'))
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env.filters['pycomment'] = python_comment
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env.filters['indent'] = indent
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env.filters['rm_fake'] = rm_fake
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env.filters['rm_ansi'] = remove_ansi
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class ConverterTemplate(Configurable):
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display_data_priority = ['pdf', 'svg', 'png', 'jpg', 'text']
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#-------------------------------------------------------------------------
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# Instance-level attributes that are set in the constructor for this
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# class.
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#-------------------------------------------------------------------------
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infile = Any()
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infile_dir = Unicode()
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def __init__(self, config=None, **kw):
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self.template = env.get_template('python.tpl')
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super(ConverterTemplate,self).__init__(config=config)
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def _get_prompt_number(self, cell):
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return cell.prompt_number if hasattr(cell, 'prompt_number') \
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else self.blank_symbol
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def process(self):
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converted_cells = []
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for worksheet in self.nb.worksheets:
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for cell in worksheet.cells:
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cell.type = cell.cell_type
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converted_cells.append(cell)
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continue
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if cell.cell_type in ('code'):
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converted_cells.append({'type':'code','source':cell.input})
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else :
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converted_cells.append({'type':cell.cell_type,'source': python_comment(cell.source)})
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return converted_cells
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def convert(self, cell_separator='\n'):
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return self.template.render(cells=self.process())
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def read(self, filename):
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"read and parse notebook into NotebookNode called self.nb"
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with open(filename) as f:
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self.nb = nbformat.read(f, 'json')
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