forked from s_ranjbar/city_retrofit
565 lines
21 KiB
Python
565 lines
21 KiB
Python
#!/usr/bin/env python
|
|
"""NbConvert is a utility for conversion of .ipynb files.
|
|
|
|
Command-line interface for the NbConvert conversion utility.
|
|
"""
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
from __future__ import print_function
|
|
|
|
import logging
|
|
import sys
|
|
import os
|
|
import glob
|
|
from textwrap import fill, dedent
|
|
from ipython_genutils.text import indent
|
|
|
|
from jupyter_core.application import JupyterApp, base_aliases, base_flags
|
|
from traitlets.config import catch_config_error, Configurable
|
|
from traitlets import (
|
|
Unicode, List, Instance, DottedObjectName, Type, Bool,
|
|
default, observe,
|
|
)
|
|
|
|
from traitlets.utils.importstring import import_item
|
|
|
|
from .exporters.base import get_export_names, get_exporter
|
|
from nbconvert import exporters, preprocessors, writers, postprocessors, __version__
|
|
from .utils.base import NbConvertBase
|
|
from .utils.exceptions import ConversionException
|
|
from .utils.io import unicode_stdin_stream
|
|
|
|
#-----------------------------------------------------------------------------
|
|
#Classes and functions
|
|
#-----------------------------------------------------------------------------
|
|
|
|
class DottedOrNone(DottedObjectName):
|
|
"""A string holding a valid dotted object name in Python, such as A.b3._c
|
|
Also allows for None type.
|
|
"""
|
|
default_value = u''
|
|
|
|
def validate(self, obj, value):
|
|
if value is not None and len(value) > 0:
|
|
return super(DottedOrNone, self).validate(obj, value)
|
|
else:
|
|
return value
|
|
|
|
nbconvert_aliases = {}
|
|
nbconvert_aliases.update(base_aliases)
|
|
nbconvert_aliases.update({
|
|
'to' : 'NbConvertApp.export_format',
|
|
'template' : 'TemplateExporter.template_file',
|
|
'writer' : 'NbConvertApp.writer_class',
|
|
'post': 'NbConvertApp.postprocessor_class',
|
|
'output': 'NbConvertApp.output_base',
|
|
'output-dir': 'FilesWriter.build_directory',
|
|
'reveal-prefix': 'SlidesExporter.reveal_url_prefix',
|
|
'nbformat': 'NotebookExporter.nbformat_version',
|
|
})
|
|
|
|
nbconvert_flags = {}
|
|
nbconvert_flags.update(base_flags)
|
|
nbconvert_flags.update({
|
|
'execute' : (
|
|
{'ExecutePreprocessor' : {'enabled' : True}},
|
|
"Execute the notebook prior to export."
|
|
),
|
|
'allow-errors' : (
|
|
{'ExecutePreprocessor' : {'allow_errors' : True}},
|
|
("Continue notebook execution even if one of the cells throws "
|
|
"an error and include the error message in the cell output "
|
|
"(the default behaviour is to abort conversion). This flag "
|
|
"is only relevant if '--execute' was specified, too.")
|
|
),
|
|
'stdin' : (
|
|
{'NbConvertApp' : {
|
|
'from_stdin' : True,
|
|
}
|
|
},
|
|
"read a single notebook file from stdin. Write the resulting notebook with default basename 'notebook.*'"
|
|
),
|
|
'stdout' : (
|
|
{'NbConvertApp' : {'writer_class' : "StdoutWriter"}},
|
|
"Write notebook output to stdout instead of files."
|
|
),
|
|
'inplace' : (
|
|
{
|
|
'NbConvertApp' : {
|
|
'use_output_suffix' : False,
|
|
'export_format' : 'notebook',
|
|
},
|
|
'FilesWriter' : {'build_directory': ''},
|
|
},
|
|
"""Run nbconvert in place, overwriting the existing notebook (only
|
|
relevant when converting to notebook format)"""
|
|
),
|
|
'clear-output' : (
|
|
{
|
|
'NbConvertApp' : {
|
|
'use_output_suffix' : False,
|
|
'export_format' : 'notebook',
|
|
},
|
|
'FilesWriter' : {'build_directory': ''},
|
|
'ClearOutputPreprocessor' : {'enabled' : True},
|
|
},
|
|
"""Clear output of current file and save in place,
|
|
overwriting the existing notebook. """
|
|
),
|
|
'no-prompt' : (
|
|
{'TemplateExporter' : {
|
|
'exclude_input_prompt' : True,
|
|
'exclude_output_prompt' : True,
|
|
}
|
|
},
|
|
"Exclude input and output prompts from converted document."
|
|
),
|
|
'no-input' : (
|
|
{'TemplateExporter' : {
|
|
'exclude_output_prompt' : True,
|
|
'exclude_input': True,
|
|
}
|
|
},
|
|
"""Exclude input cells and output prompts from converted document.
|
|
This mode is ideal for generating code-free reports."""
|
|
),
|
|
})
|
|
|
|
|
|
class NbConvertApp(JupyterApp):
|
|
"""Application used to convert from notebook file type (``*.ipynb``)"""
|
|
|
|
version = __version__
|
|
name = 'jupyter-nbconvert'
|
|
aliases = nbconvert_aliases
|
|
flags = nbconvert_flags
|
|
|
|
@default('log_level')
|
|
def _log_level_default(self):
|
|
return logging.INFO
|
|
|
|
classes = List()
|
|
@default('classes')
|
|
def _classes_default(self):
|
|
classes = [NbConvertBase]
|
|
for pkg in (exporters, preprocessors, writers, postprocessors):
|
|
for name in dir(pkg):
|
|
cls = getattr(pkg, name)
|
|
if isinstance(cls, type) and issubclass(cls, Configurable):
|
|
classes.append(cls)
|
|
|
|
return classes
|
|
|
|
description = Unicode(
|
|
u"""This application is used to convert notebook files (*.ipynb)
|
|
to various other formats.
|
|
|
|
WARNING: THE COMMANDLINE INTERFACE MAY CHANGE IN FUTURE RELEASES.""")
|
|
|
|
output_base = Unicode('', help='''overwrite base name use for output files.
|
|
can only be used when converting one notebook at a time.
|
|
''').tag(config=True)
|
|
|
|
use_output_suffix = Bool(
|
|
True,
|
|
help="""Whether to apply a suffix prior to the extension (only relevant
|
|
when converting to notebook format). The suffix is determined by
|
|
the exporter, and is usually '.nbconvert'."""
|
|
).tag(config=True)
|
|
|
|
output_files_dir = Unicode('{notebook_name}_files',
|
|
help='''Directory to copy extra files (figures) to.
|
|
'{notebook_name}' in the string will be converted to notebook
|
|
basename.'''
|
|
).tag(config=True)
|
|
|
|
examples = Unicode(u"""
|
|
The simplest way to use nbconvert is
|
|
|
|
> jupyter nbconvert mynotebook.ipynb
|
|
|
|
which will convert mynotebook.ipynb to the default format (probably HTML).
|
|
|
|
You can specify the export format with `--to`.
|
|
Options include {formats}.
|
|
|
|
> jupyter nbconvert --to latex mynotebook.ipynb
|
|
|
|
Both HTML and LaTeX support multiple output templates. LaTeX includes
|
|
'base', 'article' and 'report'. HTML includes 'basic' and 'full'. You
|
|
can specify the flavor of the format used.
|
|
|
|
> jupyter nbconvert --to html --template basic mynotebook.ipynb
|
|
|
|
You can also pipe the output to stdout, rather than a file
|
|
|
|
> jupyter nbconvert mynotebook.ipynb --stdout
|
|
|
|
PDF is generated via latex
|
|
|
|
> jupyter nbconvert mynotebook.ipynb --to pdf
|
|
|
|
You can get (and serve) a Reveal.js-powered slideshow
|
|
|
|
> jupyter nbconvert myslides.ipynb --to slides --post serve
|
|
|
|
Multiple notebooks can be given at the command line in a couple of
|
|
different ways:
|
|
|
|
> jupyter nbconvert notebook*.ipynb
|
|
> jupyter nbconvert notebook1.ipynb notebook2.ipynb
|
|
|
|
or you can specify the notebooks list in a config file, containing::
|
|
|
|
c.NbConvertApp.notebooks = ["my_notebook.ipynb"]
|
|
|
|
> jupyter nbconvert --config mycfg.py
|
|
""".format(formats=get_export_names()))
|
|
|
|
# Writer specific variables
|
|
writer = Instance('nbconvert.writers.base.WriterBase',
|
|
help="""Instance of the writer class used to write the
|
|
results of the conversion.""", allow_none=True)
|
|
writer_class = DottedObjectName('FilesWriter',
|
|
help="""Writer class used to write the
|
|
results of the conversion""").tag(config=True)
|
|
writer_aliases = {'fileswriter': 'nbconvert.writers.files.FilesWriter',
|
|
'debugwriter': 'nbconvert.writers.debug.DebugWriter',
|
|
'stdoutwriter': 'nbconvert.writers.stdout.StdoutWriter'}
|
|
writer_factory = Type(allow_none=True)
|
|
|
|
@observe('writer_class')
|
|
def _writer_class_changed(self, change):
|
|
new = change['new']
|
|
if new.lower() in self.writer_aliases:
|
|
new = self.writer_aliases[new.lower()]
|
|
self.writer_factory = import_item(new)
|
|
|
|
# Post-processor specific variables
|
|
postprocessor = Instance('nbconvert.postprocessors.base.PostProcessorBase',
|
|
help="""Instance of the PostProcessor class used to write the
|
|
results of the conversion.""", allow_none=True)
|
|
|
|
postprocessor_class = DottedOrNone(
|
|
help="""PostProcessor class used to write the
|
|
results of the conversion"""
|
|
).tag(config=True)
|
|
postprocessor_aliases = {'serve': 'nbconvert.postprocessors.serve.ServePostProcessor'}
|
|
postprocessor_factory = Type(None, allow_none=True)
|
|
|
|
@observe('postprocessor_class')
|
|
def _postprocessor_class_changed(self, change):
|
|
new = change['new']
|
|
if new.lower() in self.postprocessor_aliases:
|
|
new = self.postprocessor_aliases[new.lower()]
|
|
if new:
|
|
self.postprocessor_factory = import_item(new)
|
|
|
|
ipywidgets_base_url = Unicode("https://unpkg.com/",
|
|
help="URL base for ipywidgets package").tag(config=True)
|
|
|
|
|
|
export_format = Unicode(
|
|
'html',
|
|
allow_none=False,
|
|
help="""The export format to be used, either one of the built-in formats
|
|
{formats}
|
|
or a dotted object name that represents the import path for an
|
|
`Exporter` class""".format(formats=get_export_names())
|
|
).tag(config=True)
|
|
|
|
notebooks = List([], help="""List of notebooks to convert.
|
|
Wildcards are supported.
|
|
Filenames passed positionally will be added to the list.
|
|
"""
|
|
).tag(config=True)
|
|
from_stdin = Bool(False, help="read a single notebook from stdin.").tag(config=True)
|
|
|
|
@catch_config_error
|
|
def initialize(self, argv=None):
|
|
"""Initialize application, notebooks, writer, and postprocessor"""
|
|
self.init_syspath()
|
|
super(NbConvertApp, self).initialize(argv)
|
|
self.init_notebooks()
|
|
self.init_writer()
|
|
self.init_postprocessor()
|
|
|
|
def init_syspath(self):
|
|
"""Add the cwd to the sys.path ($PYTHONPATH)"""
|
|
sys.path.insert(0, os.getcwd())
|
|
|
|
def init_notebooks(self):
|
|
"""Construct the list of notebooks.
|
|
|
|
If notebooks are passed on the command-line,
|
|
they override (rather than add) notebooks specified in config files.
|
|
Glob each notebook to replace notebook patterns with filenames.
|
|
"""
|
|
|
|
# Specifying notebooks on the command-line overrides (rather than
|
|
# adds) the notebook list
|
|
if self.extra_args:
|
|
patterns = self.extra_args
|
|
else:
|
|
patterns = self.notebooks
|
|
|
|
# Use glob to replace all the notebook patterns with filenames.
|
|
filenames = []
|
|
for pattern in patterns:
|
|
|
|
# Use glob to find matching filenames. Allow the user to convert
|
|
# notebooks without having to type the extension.
|
|
globbed_files = glob.glob(pattern)
|
|
globbed_files.extend(glob.glob(pattern + '.ipynb'))
|
|
if not globbed_files:
|
|
self.log.warning("pattern %r matched no files", pattern)
|
|
|
|
for filename in globbed_files:
|
|
if not filename in filenames:
|
|
filenames.append(filename)
|
|
self.notebooks = filenames
|
|
|
|
def init_writer(self):
|
|
"""Initialize the writer (which is stateless)"""
|
|
self._writer_class_changed({ 'new': self.writer_class })
|
|
self.writer = self.writer_factory(parent=self)
|
|
if hasattr(self.writer, 'build_directory') and self.writer.build_directory != '':
|
|
self.use_output_suffix = False
|
|
|
|
def init_postprocessor(self):
|
|
"""Initialize the postprocessor (which is stateless)"""
|
|
self._postprocessor_class_changed({'new': self.postprocessor_class})
|
|
if self.postprocessor_factory:
|
|
self.postprocessor = self.postprocessor_factory(parent=self)
|
|
|
|
def start(self):
|
|
"""Run start after initialization process has completed"""
|
|
super(NbConvertApp, self).start()
|
|
self.convert_notebooks()
|
|
|
|
def init_single_notebook_resources(self, notebook_filename):
|
|
"""Step 1: Initialize resources
|
|
|
|
This initializes the resources dictionary for a single notebook.
|
|
|
|
Returns
|
|
-------
|
|
|
|
dict
|
|
resources dictionary for a single notebook that MUST include the following keys:
|
|
- config_dir: the location of the Jupyter config directory
|
|
- unique_key: the notebook name
|
|
- output_files_dir: a directory where output files (not
|
|
including the notebook itself) should be saved
|
|
"""
|
|
basename = os.path.basename(notebook_filename)
|
|
notebook_name = basename[:basename.rfind('.')]
|
|
if self.output_base:
|
|
# strip duplicate extension from output_base, to avoid Basename.ext.ext
|
|
if getattr(self.exporter, 'file_extension', False):
|
|
base, ext = os.path.splitext(self.output_base)
|
|
if ext == self.exporter.file_extension:
|
|
self.output_base = base
|
|
notebook_name = self.output_base
|
|
|
|
self.log.debug("Notebook name is '%s'", notebook_name)
|
|
|
|
# first initialize the resources we want to use
|
|
resources = {}
|
|
resources['config_dir'] = self.config_dir
|
|
resources['unique_key'] = notebook_name
|
|
|
|
output_files_dir = (self.output_files_dir
|
|
.format(notebook_name=notebook_name))
|
|
|
|
resources['output_files_dir'] = output_files_dir
|
|
|
|
resources['ipywidgets_base_url'] = self.ipywidgets_base_url
|
|
|
|
return resources
|
|
|
|
def export_single_notebook(self, notebook_filename, resources, input_buffer=None):
|
|
"""Step 2: Export the notebook
|
|
|
|
Exports the notebook to a particular format according to the specified
|
|
exporter. This function returns the output and (possibly modified)
|
|
resources from the exporter.
|
|
|
|
Parameters
|
|
----------
|
|
notebook_filename : str
|
|
name of notebook file.
|
|
resources : dict
|
|
input_buffer :
|
|
readable file-like object returning unicode.
|
|
if not None, notebook_filename is ignored
|
|
|
|
Returns
|
|
-------
|
|
output
|
|
|
|
dict
|
|
resources (possibly modified)
|
|
"""
|
|
try:
|
|
if input_buffer is not None:
|
|
output, resources = self.exporter.from_file(input_buffer, resources=resources)
|
|
else:
|
|
output, resources = self.exporter.from_filename(notebook_filename, resources=resources)
|
|
except ConversionException:
|
|
self.log.error("Error while converting '%s'", notebook_filename, exc_info=True)
|
|
self.exit(1)
|
|
|
|
return output, resources
|
|
|
|
def write_single_notebook(self, output, resources):
|
|
"""Step 3: Write the notebook to file
|
|
|
|
This writes output from the exporter to file using the specified writer.
|
|
It returns the results from the writer.
|
|
|
|
Parameters
|
|
----------
|
|
output :
|
|
resources : dict
|
|
resources for a single notebook including name, config directory
|
|
and directory to save output
|
|
|
|
Returns
|
|
-------
|
|
file
|
|
results from the specified writer output of exporter
|
|
"""
|
|
if 'unique_key' not in resources:
|
|
raise KeyError("unique_key MUST be specified in the resources, but it is not")
|
|
|
|
notebook_name = resources['unique_key']
|
|
if self.use_output_suffix and not self.output_base:
|
|
notebook_name += resources.get('output_suffix', '')
|
|
|
|
write_results = self.writer.write(
|
|
output, resources, notebook_name=notebook_name)
|
|
return write_results
|
|
|
|
def postprocess_single_notebook(self, write_results):
|
|
"""Step 4: Post-process the written file
|
|
|
|
Only used if a postprocessor has been specified. After the
|
|
converted notebook is written to a file in Step 3, this post-processes
|
|
the notebook.
|
|
"""
|
|
# Post-process if post processor has been defined.
|
|
if hasattr(self, 'postprocessor') and self.postprocessor:
|
|
self.postprocessor(write_results)
|
|
|
|
def convert_single_notebook(self, notebook_filename, input_buffer=None):
|
|
"""Convert a single notebook.
|
|
|
|
Performs the following steps:
|
|
|
|
1. Initialize notebook resources
|
|
2. Export the notebook to a particular format
|
|
3. Write the exported notebook to file
|
|
4. (Maybe) postprocess the written file
|
|
|
|
Parameters
|
|
----------
|
|
notebook_filename : str
|
|
input_buffer :
|
|
If input_buffer is not None, conversion is done and the buffer is
|
|
used as source into a file basenamed by the notebook_filename
|
|
argument.
|
|
"""
|
|
if input_buffer is None:
|
|
self.log.info("Converting notebook %s to %s", notebook_filename, self.export_format)
|
|
else:
|
|
self.log.info("Converting notebook into %s", self.export_format)
|
|
|
|
resources = self.init_single_notebook_resources(notebook_filename)
|
|
output, resources = self.export_single_notebook(notebook_filename, resources, input_buffer=input_buffer)
|
|
write_results = self.write_single_notebook(output, resources)
|
|
self.postprocess_single_notebook(write_results)
|
|
|
|
def convert_notebooks(self):
|
|
"""Convert the notebooks in the self.notebook traitlet """
|
|
# check that the output base isn't specified if there is more than
|
|
# one notebook to convert
|
|
if self.output_base != '' and len(self.notebooks) > 1:
|
|
self.log.error(
|
|
"""
|
|
UsageError: --output flag or `NbConvertApp.output_base` config option
|
|
cannot be used when converting multiple notebooks.
|
|
"""
|
|
)
|
|
self.exit(1)
|
|
|
|
# initialize the exporter
|
|
cls = get_exporter(self.export_format)
|
|
self.exporter = cls(config=self.config)
|
|
|
|
# no notebooks to convert!
|
|
if len(self.notebooks) == 0 and not self.from_stdin:
|
|
self.print_help()
|
|
sys.exit(-1)
|
|
|
|
# convert each notebook
|
|
if not self.from_stdin:
|
|
for notebook_filename in self.notebooks:
|
|
self.convert_single_notebook(notebook_filename)
|
|
else:
|
|
input_buffer = unicode_stdin_stream()
|
|
# default name when conversion from stdin
|
|
self.convert_single_notebook("notebook.ipynb", input_buffer=input_buffer)
|
|
|
|
def document_flag_help(self):
|
|
"""
|
|
Return a string containing descriptions of all the flags.
|
|
"""
|
|
flags = "The following flags are defined:\n\n"
|
|
for flag, (cfg, fhelp) in self.flags.items():
|
|
flags += "{}\n".format(flag)
|
|
flags += indent(fill(fhelp, 80)) + '\n\n'
|
|
flags += indent(fill("Long Form: "+str(cfg), 80)) + '\n\n'
|
|
return flags
|
|
|
|
def document_alias_help(self):
|
|
"""Return a string containing all of the aliases"""
|
|
|
|
aliases = "The folowing aliases are defined:\n\n"
|
|
for alias, longname in self.aliases.items():
|
|
aliases += "\t**{}** ({})\n\n".format(alias, longname)
|
|
return aliases
|
|
|
|
def document_config_options(self):
|
|
"""
|
|
Provides a much improves version of the configuration documentation by
|
|
breaking the configuration options into app, exporter, writer,
|
|
preprocessor, postprocessor, and other sections.
|
|
"""
|
|
categories = {category: [c for c in self._classes_inc_parents() if category in c.__name__.lower()]
|
|
for category in ['app', 'exporter', 'writer', 'preprocessor', 'postprocessor']}
|
|
accounted_for = {c for category in categories.values() for c in category}
|
|
categories['other']= [c for c in self._classes_inc_parents() if c not in accounted_for]
|
|
|
|
header = dedent("""
|
|
{section} Options
|
|
-----------------------
|
|
|
|
""")
|
|
sections = ""
|
|
for category in categories:
|
|
sections += header.format(section=category.title())
|
|
if category in ['exporter','preprocessor','writer']:
|
|
sections += ".. image:: _static/{image}_inheritance.png\n\n".format(image=category)
|
|
sections += '\n'.join(c.class_config_rst_doc() for c in categories[category])
|
|
|
|
return sections.replace(' : ',r' \: ')
|
|
|
|
#-----------------------------------------------------------------------------
|
|
# Main entry point
|
|
#-----------------------------------------------------------------------------
|
|
|
|
main = launch_new_instance = NbConvertApp.launch_instance
|