115 lines
3.2 KiB
Python
115 lines
3.2 KiB
Python
# This is all taken from:
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# https://jupyter-notebook.readthedocs.io/en/stable/examples/Notebook/Importing%20Notebooks.html
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import io
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import os
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import sys
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import types
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from importlib.abc import MetaPathFinder
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from importlib.util import spec_from_loader
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from nbformat import read
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from IPython import get_ipython
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from IPython.core.interactiveshell import InteractiveShell
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ALWAYS_IMPORT = """
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import datetime
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import decimal
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import logging
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import logging.handlers
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import numbers
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import pandas as pd
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import traceback
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import typing
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from IPython.display import display, HTML
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"""
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def find_notebook(fullname, path=None):
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"""Find a notebook, given its fully qualified name and an optional path
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This turns "foo.bar" into "foo/bar.ipynb"
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and tries turning "Foo_Bar" into "Foo Bar" if Foo_Bar
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does not exist.
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"""
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name = fullname.rsplit('.', 1)[-1]
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if not path:
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path = ['']
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for d in path:
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nb_path = os.path.join(d, name + ".ipynb")
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if os.path.isfile(nb_path):
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return nb_path
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# let import Notebook_Name find "Notebook Name.ipynb"
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nb_path = nb_path.replace("_", " ")
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if os.path.isfile(nb_path):
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return nb_path
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class NotebookLoader(object):
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"""Module Loader for Jupyter Notebooks"""
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def __init__(self, path=None):
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self.shell = InteractiveShell.instance()
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self.path = path
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def load_module(self, fullname):
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"""import a notebook as a module"""
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path = find_notebook(fullname, self.path)
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# load the notebook object
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with io.open(path, 'r', encoding='utf-8') as f:
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nb = read(f, 4)
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# create the module and add it to sys.modules
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# if name in sys.modules:
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# return sys.modules[name]
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mod = types.ModuleType(fullname)
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mod.__file__ = path
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mod.__loader__ = self
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mod.__dict__['get_ipython'] = get_ipython
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sys.modules[fullname] = mod
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# extra work to ensure that magics that would affect the user_ns
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# actually affect the notebook module's ns
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save_user_ns = self.shell.user_ns
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self.shell.user_ns = mod.__dict__
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try:
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exec(ALWAYS_IMPORT, mod.__dict__)
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for cell in nb.cells:
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if cell.cell_type == 'code':
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# transform the input to executable Python
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code = self.shell.input_transformer_manager.transform_cell(
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cell.source)
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# run the code in themodule
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exec(code, mod.__dict__)
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finally:
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self.shell.user_ns = save_user_ns
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return mod
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class NotebookFinder(MetaPathFinder):
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"""Module finder that locates Jupyter Notebooks"""
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def __init__(self):
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super().__init__()
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def find_spec(self, fullname, path, target=None):
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found = False
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try:
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nb_path = find_notebook(fullname, path)
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if nb_path:
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found = True
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except Exception:
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pass
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if not found:
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return
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notebookloader = NotebookLoader(path)
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return spec_from_loader(fullname, notebookloader)
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sys.meta_path.append(NotebookFinder())
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