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1 | 1 | #!/usr/bin/env python |
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2 | 2 | """NBConvert is a utility for conversion of .ipynb files. |
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3 | 3 | |
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4 | 4 | Command-line interface for the NbConvert conversion utility. |
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5 | 5 | """ |
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6 | 6 | #----------------------------------------------------------------------------- |
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7 | 7 | #Copyright (c) 2013, the IPython Development Team. |
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8 | 8 | # |
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9 | 9 | #Distributed under the terms of the Modified BSD License. |
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10 | 10 | # |
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11 | 11 | #The full license is in the file COPYING.txt, distributed with this software. |
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12 | 12 | #----------------------------------------------------------------------------- |
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13 | 13 | |
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14 | 14 | #----------------------------------------------------------------------------- |
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15 | 15 | #Imports |
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16 | 16 | #----------------------------------------------------------------------------- |
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17 | 17 | |
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18 | 18 | # Stdlib imports |
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19 | 19 | from __future__ import print_function |
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20 | 20 | |
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21 | 21 | import logging |
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22 | 22 | import sys |
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23 | 23 | import os |
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24 | 24 | import glob |
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25 | 25 | |
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26 | 26 | # From IPython |
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27 | 27 | from IPython.core.application import BaseIPythonApplication, base_aliases, base_flags |
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28 | from IPython.core.profiledir import ProfileDir | |
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28 | 29 | from IPython.config import catch_config_error, Configurable |
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29 | 30 | from IPython.utils.traitlets import ( |
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30 | 31 | Unicode, List, Instance, DottedObjectName, Type, CaselessStrEnum, |
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31 | 32 | ) |
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32 | 33 | from IPython.utils.importstring import import_item |
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33 | 34 | from IPython.utils.text import dedent |
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34 | 35 | |
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35 | 36 | from .exporters.export import get_export_names, exporter_map |
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36 | 37 | from IPython.nbconvert import exporters, preprocessors, writers, postprocessors |
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37 | 38 | from .utils.base import NbConvertBase |
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38 | 39 | from .utils.exceptions import ConversionException |
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39 | 40 | |
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40 | 41 | #----------------------------------------------------------------------------- |
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41 | 42 | #Classes and functions |
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42 | 43 | #----------------------------------------------------------------------------- |
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43 | 44 | |
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44 | 45 | class DottedOrNone(DottedObjectName): |
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45 | 46 | """ |
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46 | 47 | A string holding a valid dotted object name in Python, such as A.b3._c |
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47 | 48 | Also allows for None type.""" |
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48 | 49 | |
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49 | 50 | default_value = u'' |
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50 | 51 | |
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51 | 52 | def validate(self, obj, value): |
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52 | 53 | if value is not None and len(value) > 0: |
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53 | 54 | return super(DottedOrNone, self).validate(obj, value) |
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54 | 55 | else: |
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55 | 56 | return value |
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56 | 57 | |
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57 | 58 | nbconvert_aliases = {} |
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58 | 59 | nbconvert_aliases.update(base_aliases) |
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59 | 60 | nbconvert_aliases.update({ |
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60 | 61 | 'to' : 'NbConvertApp.export_format', |
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61 | 62 | 'template' : 'Exporter.template_file', |
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62 | 63 | 'writer' : 'NbConvertApp.writer_class', |
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63 | 64 | 'post': 'NbConvertApp.postprocessor_class', |
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64 | 65 | 'output': 'NbConvertApp.output_base', |
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65 | 66 | 'offline-slides': 'RevealHelpPreprocessor.url_prefix', |
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66 | 67 | 'slide-notes': 'RevealHelpPreprocessor.speaker_notes' |
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67 | 68 | }) |
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68 | 69 | |
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69 | 70 | nbconvert_flags = {} |
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70 | 71 | nbconvert_flags.update(base_flags) |
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71 | 72 | nbconvert_flags.update({ |
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72 | 73 | 'stdout' : ( |
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73 | 74 | {'NbConvertApp' : {'writer_class' : "StdoutWriter"}}, |
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74 | 75 | "Write notebook output to stdout instead of files." |
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75 | 76 | ) |
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76 | 77 | }) |
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77 | 78 | |
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78 | 79 | |
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79 | 80 | class NbConvertApp(BaseIPythonApplication): |
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80 | 81 | """Application used to convert to and from notebook file type (*.ipynb)""" |
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81 | 82 | |
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82 | 83 | name = 'ipython-nbconvert' |
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83 | 84 | aliases = nbconvert_aliases |
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84 | 85 | flags = nbconvert_flags |
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85 | 86 | |
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86 | 87 | def _log_level_default(self): |
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87 | 88 | return logging.INFO |
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88 | 89 | |
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89 | 90 | def _classes_default(self): |
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90 | classes = [NbConvertBase] | |
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91 | classes = [NbConvertBase, ProfileDir] | |
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91 | 92 | for pkg in (exporters, preprocessors, writers): |
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92 | 93 | for name in dir(pkg): |
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93 | 94 | cls = getattr(pkg, name) |
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94 | 95 | if isinstance(cls, type) and issubclass(cls, Configurable): |
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95 | 96 | classes.append(cls) |
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97 | ||
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96 | 98 | return classes |
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97 | 99 | |
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98 | 100 | description = Unicode( |
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99 | 101 | u"""This application is used to convert notebook files (*.ipynb) |
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100 | 102 | to various other formats. |
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101 | 103 | |
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102 | 104 | WARNING: THE COMMANDLINE INTERFACE MAY CHANGE IN FUTURE RELEASES.""") |
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103 | 105 | |
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104 | 106 | output_base = Unicode('', config=True, help='''overwrite base name use for output files. |
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105 | 107 | can only be use when converting one notebook at a time. |
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106 | 108 | ''') |
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107 | 109 | |
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108 | 110 | examples = Unicode(u""" |
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109 | 111 | The simplest way to use nbconvert is |
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110 | 112 | |
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111 | 113 | > ipython nbconvert mynotebook.ipynb |
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112 | 114 | |
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113 | 115 | which will convert mynotebook.ipynb to the default format (probably HTML). |
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114 | 116 | |
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115 | 117 | You can specify the export format with `--to`. |
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116 | 118 | Options include {0} |
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117 | 119 | |
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118 | 120 | > ipython nbconvert --to latex mynotebook.ipnynb |
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119 | 121 | |
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120 | 122 | Both HTML and LaTeX support multiple output templates. LaTeX includes |
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121 | 123 | 'basic', 'book', and 'article'. HTML includes 'basic' and 'full'. You |
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122 | 124 | can specify the flavor of the format used. |
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123 | 125 | |
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124 | 126 | > ipython nbconvert --to html --template basic mynotebook.ipynb |
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125 | 127 | |
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126 | 128 | You can also pipe the output to stdout, rather than a file |
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127 | 129 | |
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128 | 130 | > ipython nbconvert mynotebook.ipynb --stdout |
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129 | 131 | |
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130 | 132 | A post-processor can be used to compile a PDF |
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131 | 133 | |
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132 | 134 | > ipython nbconvert mynotebook.ipynb --to latex --post PDF |
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133 | 135 | |
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134 | 136 | You can get (and serve) a Reveal.js-powered slideshow |
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135 | 137 | |
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136 | 138 | > ipython nbconvert myslides.ipynb --to slides --post serve |
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137 | 139 | |
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138 | 140 | Multiple notebooks can be given at the command line in a couple of |
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139 | 141 | different ways: |
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140 | 142 | |
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141 | 143 | > ipython nbconvert notebook*.ipynb |
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142 | 144 | > ipython nbconvert notebook1.ipynb notebook2.ipynb |
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143 | 145 | |
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144 | 146 | or you can specify the notebooks list in a config file, containing:: |
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145 | 147 | |
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146 | 148 | c.NbConvertApp.notebooks = ["my_notebook.ipynb"] |
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147 | 149 | |
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148 | 150 | > ipython nbconvert --config mycfg.py |
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149 | 151 | """.format(get_export_names())) |
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150 | 152 | |
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151 | 153 | # Writer specific variables |
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152 | 154 | writer = Instance('IPython.nbconvert.writers.base.WriterBase', |
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153 | 155 | help="""Instance of the writer class used to write the |
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154 | 156 | results of the conversion.""") |
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155 | 157 | writer_class = DottedObjectName('FilesWriter', config=True, |
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156 | 158 | help="""Writer class used to write the |
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157 | 159 | results of the conversion""") |
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158 | 160 | writer_aliases = {'fileswriter': 'IPython.nbconvert.writers.files.FilesWriter', |
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159 | 161 | 'debugwriter': 'IPython.nbconvert.writers.debug.DebugWriter', |
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160 | 162 | 'stdoutwriter': 'IPython.nbconvert.writers.stdout.StdoutWriter'} |
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161 | 163 | writer_factory = Type() |
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162 | 164 | |
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163 | 165 | def _writer_class_changed(self, name, old, new): |
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164 | 166 | if new.lower() in self.writer_aliases: |
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165 | 167 | new = self.writer_aliases[new.lower()] |
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166 | 168 | self.writer_factory = import_item(new) |
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167 | 169 | |
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168 | 170 | # Post-processor specific variables |
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169 | 171 | postprocessor = Instance('IPython.nbconvert.postprocessors.base.PostProcessorBase', |
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170 | 172 | help="""Instance of the PostProcessor class used to write the |
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171 | 173 | results of the conversion.""") |
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172 | 174 | |
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173 | 175 | postprocessor_class = DottedOrNone(config=True, |
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174 | 176 | help="""PostProcessor class used to write the |
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175 | 177 | results of the conversion""") |
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176 | 178 | postprocessor_aliases = {'pdf': 'IPython.nbconvert.postprocessors.pdf.PDFPostProcessor', |
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177 | 179 | 'serve': 'IPython.nbconvert.postprocessors.serve.ServePostProcessor'} |
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178 | 180 | postprocessor_factory = Type() |
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179 | 181 | |
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180 | 182 | def _postprocessor_class_changed(self, name, old, new): |
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181 | 183 | if new.lower() in self.postprocessor_aliases: |
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182 | 184 | new = self.postprocessor_aliases[new.lower()] |
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183 | 185 | if new: |
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184 | 186 | self.postprocessor_factory = import_item(new) |
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185 | 187 | |
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186 | 188 | |
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187 | 189 | # Other configurable variables |
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188 | 190 | export_format = CaselessStrEnum(get_export_names(), |
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189 | 191 | default_value="html", |
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190 | 192 | config=True, |
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191 | 193 | help="""The export format to be used.""" |
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192 | 194 | ) |
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193 | 195 | |
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194 | 196 | notebooks = List([], config=True, help="""List of notebooks to convert. |
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195 | 197 | Wildcards are supported. |
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196 | 198 | Filenames passed positionally will be added to the list. |
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197 | 199 | """) |
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198 | 200 | |
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199 | 201 | @catch_config_error |
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200 | 202 | def initialize(self, argv=None): |
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201 | 203 | super(NbConvertApp, self).initialize(argv) |
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202 | 204 | self.init_syspath() |
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203 | 205 | self.init_notebooks() |
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204 | 206 | self.init_writer() |
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205 | 207 | self.init_postprocessor() |
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206 | 208 | |
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207 | 209 | |
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208 | 210 | |
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209 | 211 | def init_syspath(self): |
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210 | 212 | """ |
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211 | 213 | Add the cwd to the sys.path ($PYTHONPATH) |
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212 | 214 | """ |
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213 | 215 | sys.path.insert(0, os.getcwd()) |
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214 | 216 | |
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215 | 217 | |
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216 | 218 | def init_notebooks(self): |
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217 | 219 | """Construct the list of notebooks. |
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218 | 220 | If notebooks are passed on the command-line, |
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219 | 221 | they override notebooks specified in config files. |
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220 | 222 | Glob each notebook to replace notebook patterns with filenames. |
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221 | 223 | """ |
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222 | 224 | |
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223 | 225 | # Specifying notebooks on the command-line overrides (rather than adds) |
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224 | 226 | # the notebook list |
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225 | 227 | if self.extra_args: |
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226 | 228 | patterns = self.extra_args |
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227 | 229 | else: |
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228 | 230 | patterns = self.notebooks |
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229 | 231 | |
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230 | 232 | # Use glob to replace all the notebook patterns with filenames. |
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231 | 233 | filenames = [] |
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232 | 234 | for pattern in patterns: |
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233 | 235 | |
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234 | 236 | # Use glob to find matching filenames. Allow the user to convert |
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235 | 237 | # notebooks without having to type the extension. |
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236 | 238 | globbed_files = glob.glob(pattern) |
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237 | 239 | globbed_files.extend(glob.glob(pattern + '.ipynb')) |
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238 | 240 | if not globbed_files: |
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239 | 241 | self.log.warn("pattern %r matched no files", pattern) |
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240 | 242 | |
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241 | 243 | for filename in globbed_files: |
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242 | 244 | if not filename in filenames: |
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243 | 245 | filenames.append(filename) |
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244 | 246 | self.notebooks = filenames |
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245 | 247 | |
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246 | 248 | def init_writer(self): |
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247 | 249 | """ |
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248 | 250 | Initialize the writer (which is stateless) |
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249 | 251 | """ |
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250 | 252 | self._writer_class_changed(None, self.writer_class, self.writer_class) |
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251 | 253 | self.writer = self.writer_factory(parent=self) |
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252 | 254 | |
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253 | 255 | def init_postprocessor(self): |
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254 | 256 | """ |
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255 | 257 | Initialize the postprocessor (which is stateless) |
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256 | 258 | """ |
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257 | 259 | self._postprocessor_class_changed(None, self.postprocessor_class, |
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258 | 260 | self.postprocessor_class) |
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259 | 261 | if self.postprocessor_factory: |
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260 | 262 | self.postprocessor = self.postprocessor_factory(parent=self) |
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261 | 263 | |
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262 | 264 | def start(self): |
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263 | 265 | """ |
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264 | 266 | Ran after initialization completed |
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265 | 267 | """ |
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266 | 268 | super(NbConvertApp, self).start() |
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267 | 269 | self.convert_notebooks() |
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268 | 270 | |
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269 | 271 | def convert_notebooks(self): |
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270 | 272 | """ |
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271 | 273 | Convert the notebooks in the self.notebook traitlet |
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272 | 274 | """ |
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273 | 275 | # Export each notebook |
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274 | 276 | conversion_success = 0 |
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275 | 277 | |
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276 | 278 | if self.output_base != '' and len(self.notebooks) > 1: |
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277 | 279 | self.log.error( |
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278 | 280 | """UsageError: --output flag or `NbConvertApp.output_base` config option |
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279 | 281 | cannot be used when converting multiple notebooks. |
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280 | 282 | """) |
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281 | 283 | self.exit(1) |
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282 | 284 | |
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283 | 285 | exporter = exporter_map[self.export_format](config=self.config) |
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284 | 286 | |
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285 | 287 | for notebook_filename in self.notebooks: |
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286 | 288 | self.log.info("Converting notebook %s to %s", notebook_filename, self.export_format) |
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287 | 289 | |
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288 | 290 | # Get a unique key for the notebook and set it in the resources object. |
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289 | 291 | basename = os.path.basename(notebook_filename) |
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290 | 292 | notebook_name = basename[:basename.rfind('.')] |
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291 | 293 | if self.output_base: |
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292 | 294 | notebook_name = self.output_base |
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293 | 295 | resources = {} |
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294 | 296 | resources['unique_key'] = notebook_name |
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295 | 297 | resources['output_files_dir'] = '%s_files' % notebook_name |
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296 | 298 | self.log.info("Support files will be in %s", os.path.join(resources['output_files_dir'], '')) |
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297 | 299 | |
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298 | 300 | # Try to export |
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299 | 301 | try: |
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300 | 302 | output, resources = exporter.from_filename(notebook_filename, resources=resources) |
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301 | 303 | except ConversionException as e: |
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302 | 304 | self.log.error("Error while converting '%s'", notebook_filename, |
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303 | 305 | exc_info=True) |
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304 | 306 | self.exit(1) |
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305 | 307 | else: |
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306 | 308 | write_resultes = self.writer.write(output, resources, notebook_name=notebook_name) |
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307 | 309 | |
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308 | 310 | #Post-process if post processor has been defined. |
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309 | 311 | if hasattr(self, 'postprocessor') and self.postprocessor: |
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310 | 312 | self.postprocessor(write_resultes) |
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311 | 313 | conversion_success += 1 |
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312 | 314 | |
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313 | 315 | # If nothing was converted successfully, help the user. |
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314 | 316 | if conversion_success == 0: |
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315 | 317 | self.print_help() |
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316 | 318 | sys.exit(-1) |
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317 | 319 | |
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318 | 320 | #----------------------------------------------------------------------------- |
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319 | 321 | # Main entry point |
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320 | 322 | #----------------------------------------------------------------------------- |
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321 | 323 | |
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322 | 324 | launch_new_instance = NbConvertApp.launch_instance |
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