Our review
Programmatically analyzes and performs batch replacement of import patterns or code blocks within Jupyter Notebook (.ipynb) files.
Strengths
- Enables precise regex-based search and replacement across multiple notebooks
- Preserves notebook JSON structure and cell source format
- Automates repetitive refactoring tasks that would be error-prone manually
Limitations
- Requires careful regex to avoid unintended changes
- Not suitable for semantic transformations (e.g., renaming variables beyond simple strings)
- May need manual review after batch replacement to ensure correctness
Use this skill when you need to update import statements, deprecated functions, or code patterns across a large number of Jupyter notebooks.
Avoid this skill for one-off edits in a single notebook or when the transformation requires understanding of runtime state or data dependencies.
Security analysis
SafeThe skill performs local file manipulations on Jupyter notebooks using Python and does not execute arbitrary shell commands, exfiltrate data, or disable security features. It uses standard JSON parsing and writing, with no destructive patterns.
No concerns found
Examples
Replace all occurrences of 'from gwexpy.noise import asd' with 'from gwexpy.noise import asd_updated' in every .ipynb file under the current directory.In all Jupyter notebooks in the 'experiments' folder, replace 'old_function(' with 'new_function(' in all code cells.Replace 'import matplotlib.pyplot as plt' with 'import seaborn as sns' in all code cells of notebooks in the 'reports' subdirectory.name: refactor_nb description: Jupyter Notebook (.ipynb) 内のコード要素を一括置換・リファクタリングする
refactor_notebooks Skill
This skill is for programmatically analyzing Jupyter Notebook (.ipynb) files and performing batch replacement or modification of specific import patterns or code blocks.
Instructions
-
Analyze Notebook Structure:
- Load
.ipynbfiles as JSON using Python and iterate through thecellslist. - Verify if the
cell_typeof each cell iscode.
- Load
-
Filter and Match:
- Join the
sourcefield (list format) into a string and use regular expressions or keyword matching to identify target cells. - Target specific import statements (e.g.,
from gwexpy.noise import asd), function calls, or targeted comments.
- Join the
-
Implement Transformation:
- Create a transformation script to rewrite the
sourcelist of the cells in memory. - The updated source must be in list format (each element as a string ending with a newline).
- Create a transformation script to rewrite the
-
Write and Verify:
- Save the file using
json.dump, maintaining an indent of 1 (agwexpyconvention) and specifyingensure_ascii=False. - Verify that the resulting notebook is valid JSON and that the intended changes have been applied using
view_fileor similar.
- Save the file using
Usage Guidelines
- When modifying multiple notebooks across a directory, create a loop script that collects
.ipynbfiles usingglobor similar. - For complex refactoring, adopt a workflow of saving the logic as a temporary
.pyscript, executing it viarun_command, and then deleting the script.
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