mirror of
https://github.com/wassname/jupyter_contrib_nbextensions.git
synced 2026-06-27 16:10:24 +08:00
Juergen Hasch
42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
# -*- coding: utf-8 -*-
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"""This preprocessor replaces Python code in markdowncell with the result
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stored in cell metadata
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"""
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from nbconvert.preprocessors import *
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import re
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class PyMarkdownPreprocessor(Preprocessor):
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def replace_variables(self, source, variables):
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"""
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Replace {{variablename}} with stored value
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"""
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try:
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replaced = re.sub("{{(.*?)}}", lambda m: variables.get(m.group(1), ''), source)
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except TypeError:
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replaced = source
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return replaced
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def preprocess_cell(self, cell, resources, index):
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"""
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Preprocess cell
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Parameters
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----------
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cell : NotebookNode cell
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Notebook cell being processed
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resources : dictionary
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Additional resources used in the conversion process. Allows
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preprocessors to pass variables into the Jinja engine.
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cell_index : int
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Index of the cell being processed (see base.py)
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"""
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if cell.cell_type == "markdown":
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if hasattr(cell['metadata'], 'variables'):
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variables = cell['metadata']['variables']
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if len(variables) > 0:
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cell.source = self.replace_variables(cell.source, variables)
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return cell, resources
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