#!/usr/bin/env python """NBConvert is a utility for conversion of .ipynb files. Command-line interface for the NbConvert conversion utility. """ #----------------------------------------------------------------------------- #Copyright (c) 2013, the IPython Development Team. # #Distributed under the terms of the Modified BSD License. # #The full license is in the file COPYING.txt, distributed with this software. #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- #Imports #----------------------------------------------------------------------------- # Stdlib imports from __future__ import print_function import logging import sys import os import glob # From IPython from IPython.core.application import BaseIPythonApplication, base_aliases, base_flags from IPython.config import catch_config_error, Configurable from IPython.utils.traitlets import ( Unicode, List, Instance, DottedObjectName, Type, CaselessStrEnum, ) from IPython.utils.importstring import import_item from IPython.utils.text import dedent from .exporters.export import export_by_name, get_export_names, ExporterNameError from IPython.nbconvert import exporters, transformers, writers, post_processors from .utils.base import NbConvertBase from .utils.exceptions import ConversionException #----------------------------------------------------------------------------- #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' : 'Exporter.template_file', 'notebooks' : 'NbConvertApp.notebooks', 'writer' : 'NbConvertApp.writer_class', 'post': 'NbConvertApp.post_processor_class', 'output': 'NbConvertApp.output_base' }) nbconvert_flags = {} nbconvert_flags.update(base_flags) nbconvert_flags.update({ 'stdout' : ( {'NbConvertApp' : {'writer_class' : "StdoutWriter"}}, "Write notebook output to stdout instead of files." ) }) class NbConvertApp(BaseIPythonApplication): """Application used to convert to and from notebook file type (*.ipynb)""" name = 'ipython-nbconvert' aliases = nbconvert_aliases flags = nbconvert_flags def _log_level_default(self): return logging.INFO def _classes_default(self): classes = [NbConvertBase] for pkg in (exporters, transformers, writers): 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('', config=True, help='''overwrite base name use for output files. can only be use when converting one notebook at a time. ''') examples = Unicode(u""" The simplest way to use nbconvert is > ipython nbconvert mynotebook.ipynb which will convert mynotebook.ipynb to the default format (probably HTML). You can specify the export format with `--to`. Options include {0} > ipython nbconvert --to latex mynotebook.ipnynb Both HTML and LaTeX support multiple output templates. LaTeX includes 'basic', 'book', and 'article'. HTML includes 'basic' and 'full'. You can specify the flavor of the format used. > ipython nbconvert --to html --template basic mynotebook.ipynb You can also pipe the output to stdout, rather than a file > ipython nbconvert mynotebook.ipynb --stdout A post-processor can be used to compile a PDF > ipython nbconvert mynotebook.ipynb --to latex --post PDF You can get (and serve) a Reveal.js-powered slideshow > ipython nbconvert myslides.ipynb --to slides --post serve Multiple notebooks can be given at the command line in a couple of different ways: > ipython nbconvert notebook*.ipynb > ipython nbconvert notebook1.ipynb notebook2.ipynb or you can specify the notebooks list in a config file, containing:: c.NbConvertApp.notebooks = ["my_notebook.ipynb"] > ipython nbconvert --config mycfg.py """.format(get_export_names())) # Writer specific variables writer = Instance('IPython.nbconvert.writers.base.WriterBase', help="""Instance of the writer class used to write the results of the conversion.""") writer_class = DottedObjectName('FilesWriter', config=True, help="""Writer class used to write the results of the conversion""") writer_aliases = {'FilesWriter': 'IPython.nbconvert.writers.files.FilesWriter', 'DebugWriter': 'IPython.nbconvert.writers.debug.DebugWriter', 'StdoutWriter': 'IPython.nbconvert.writers.stdout.StdoutWriter'} writer_factory = Type() def _writer_class_changed(self, name, old, new): if new in self.writer_aliases: new = self.writer_aliases[new] self.writer_factory = import_item(new) # Post-processor specific variables post_processor = Instance('IPython.nbconvert.post_processors.base.PostProcessorBase', help="""Instance of the PostProcessor class used to write the results of the conversion.""") post_processor_class = DottedOrNone(config=True, help="""PostProcessor class used to write the results of the conversion""") post_processor_aliases = {'PDF': 'IPython.nbconvert.post_processors.pdf.PDFPostProcessor', 'serve': 'IPython.nbconvert.post_processors.serve.ServePostProcessor'} post_processor_factory = Type() def _post_processor_class_changed(self, name, old, new): if new in self.post_processor_aliases: new = self.post_processor_aliases[new] if new: self.post_processor_factory = import_item(new) # Other configurable variables export_format = CaselessStrEnum(get_export_names(), default_value="html", config=True, help="""The export format to be used.""" ) notebooks = List([], config=True, help="""List of notebooks to convert. Wildcards are supported. Filenames passed positionally will be added to the list. """) @catch_config_error def initialize(self, argv=None): super(NbConvertApp, self).initialize(argv) self.init_syspath() self.init_notebooks() self.init_writer() self.init_post_processor() 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 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.warn("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(None, self.writer_class, self.writer_class) self.writer = self.writer_factory(parent=self) def init_post_processor(self): """ Initialize the post_processor (which is stateless) """ self._post_processor_class_changed(None, self.post_processor_class, self.post_processor_class) if self.post_processor_factory: self.post_processor = self.post_processor_factory(parent=self) def start(self): """ Ran after initialization completed """ super(NbConvertApp, self).start() self.convert_notebooks() def convert_notebooks(self): """ Convert the notebooks in the self.notebook traitlet """ # Export each notebook conversion_success = 0 if self.output_base != '' and len(self.notebooks) > 1: print(dedent( """UsageError: --output flag or `NbConvertApp.output_base` config option cannot be used when converting multiple notebooks. """)) self.exit(1) for notebook_filename in self.notebooks: self.log.info("Converting notebook %s to %s", notebook_filename, self.export_format) # Get a unique key for the notebook and set it in the resources object. basename = os.path.basename(notebook_filename) notebook_name = basename[:basename.rfind('.')] if self.output_base: notebook_name = self.output_base resources = {} resources['unique_key'] = notebook_name resources['output_files_dir'] = '%s_files' % notebook_name self.log.info("Support files will be in %s", os.path.join(resources['output_files_dir'], '')) # Try to export try: output, resources = export_by_name(self.export_format, notebook_filename, resources=resources, config=self.config) except ExporterNameError as e: print("Error while converting '%s': '%s' exporter not found." %(notebook_filename, self.export_format), file=sys.stderr) print("Known exporters are:", "\n\t" + "\n\t".join(get_export_names()), file=sys.stderr) self.exit(1) except ConversionException as e: print("Error while converting '%s': %s" %(notebook_filename, e), file=sys.stderr) self.exit(1) else: write_resultes = self.writer.write(output, resources, notebook_name=notebook_name) #Post-process if post processor has been defined. if hasattr(self, 'post_processor') and self.post_processor: self.post_processor(write_resultes) conversion_success += 1 # If nothing was converted successfully, help the user. if conversion_success == 0: self.print_help() sys.exit(-1) #----------------------------------------------------------------------------- # Main entry point #----------------------------------------------------------------------------- launch_new_instance = NbConvertApp.launch_instance