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__init__.py
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__init__.py
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"""
Simple module to import Jupyter Notebook files (.ipynb) as python modules
Based mostly off https://github.com/jupyter/notebook/blob/master/docs/source/examples/Notebook/Importing%20Notebooks.ipynb,
with modifications to support more recent notebook versions.
"""
import os
import sys
import types
import requests
import nbformat
from IPython import get_ipython
from IPython.core.interactiveshell import InteractiveShell
PREFIX = 'paws.'
class NotebookLoader:
"""Module Loader for Jupyter Notebooks"""
def __init__(self, path=None):
self.shell = InteractiveShell.instance()
self.path = path
def load_module(self, fullname):
"""import a notebook as a module"""
if not fullname.startswith(PREFIX):
return False
parts = fullname[len(PREFIX):].split('.')
if len(parts) == 1:
# This is a top-level import, give back a package
# So if I'm importing paws.YuviPanda.something.something, we will
# return this for the paws.YuviPanda, so python will keep soldiering on
# FIXME: Actually read the import hooks PEP and understand wtf I am doing!
mod = types.ModuleType(fullname)
mod.__file__ = fullname
mod.__loader__ = self
mod.__path__ = fullname
sys.modules[fullname] = mod
return mod
url_segment = '/'.join([s.replace('_', ' ') for s in parts]) + '.ipynb?format=raw'
url = 'https://paws-public.wmflabs.org/paws-public/User:' + url_segment
resp = requests.get(url)
if resp.status_code == 404:
# HACCKK!! To deal with folders
mod = types.ModuleType(fullname)
mod.__file__ = fullname
mod.__loader__ = self
mod.__path__ = fullname
sys.modules[fullname] = mod
return mod
if resp.status_code != 200:
raise ImportError('No module {name} found - {code} response for {url}'.format(
name=fullname,
url=url,
code=resp.status_code
))
data = resp.text
# load the notebook object
nb = nbformat.reads(data, as_version=4)
# create the module and add it to sys.modules
# if name in sys.modules:
# return sys.modules[name]
mod = types.ModuleType(fullname)
mod.__file__ = fullname
mod.__loader__ = self
mod.__dict__['get_ipython'] = get_ipython
sys.modules[fullname] = mod
# extra work to ensure that magics that would affect the user_ns
# actually affect the notebook module's ns
save_user_ns = self.shell.user_ns
self.shell.user_ns = mod.__dict__
try:
for cell in nb.cells:
if cell.cell_type == 'code':
# transform the input to executable Python
code = self.shell.input_transformer_manager.transform_cell(cell.source)
# run the code in themodule
exec(code, mod.__dict__)
finally:
self.shell.user_ns = save_user_ns
return mod
class NotebookFinder:
"""Module finder that locates Jupyter Notebooks"""
def __init__(self):
self.loaders = {}
def find_module(self, fullname, path=None):
if fullname.startswith(PREFIX):
return NotebookLoader(path)
sys.meta_path.append(NotebookFinder())