@@ -100,6 +100,9 @@ todo_include_todos = False
 # Enable codeauthor and sectionauthor directives
 show_authors = True
 
+# Mock python-can
+autodoc_mock_imports = ["can"]
+
 
 # -- Options for HTML output ----------------------------------------------
 
# -*- coding: utf-8 -*-
#
# Scapy documentation build configuration file, created by
# sphinx-quickstart on Wed Mar 07 19:02:35 2018.
#
# This file is execfile()d with the current directory set to its
# containing dir.
#
# Note that not all possible configuration values are present in this
# autogenerated file.
#
# All configuration values have a default; values that are commented out
# serve to show the default.

import datetime

# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
#
import os
import sys
sys.path.insert(0, os.path.abspath('../../'))
sys.path.append(os.path.abspath('_ext'))


# -- General configuration ------------------------------------------------

# If your documentation needs a minimal Sphinx version, state it here.
#
needs_sphinx = '3.0.0'

# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
extensions = [
    'sphinx.ext.autodoc',
    'sphinx.ext.napoleon',
    'sphinx.ext.todo',
    'sphinx.ext.linkcode',
    'scapy_doc'
]

# Autodoc configuration
autodoc_inherit_docstrings = False
autodoc_default_options = {
    'undoc-members': True
}

# Enable the todo module
todo_include_todos = True

# Linkcode resolver
from linkcode_res import linkcode_resolve

# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']

# The suffix(es) of source filenames.
# You can specify multiple suffix as a list of string:
#
# source_suffix = ['.rst', '.md']
source_suffix = '.rst'

# The master toctree document.
master_doc = 'index'

# General information about the project.
project = 'Scapy'
year = datetime.datetime.now().year
copyright = '2008-%s Philippe Biondi and the Scapy community' % year

# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
from scapy import VERSION, VERSION_MAIN
# The short X.Y version.
release = VERSION_MAIN
# The full version, including alpha/beta/rc tags.
version = VERSION

# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None

# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This patterns also effect to html_static_path and html_extra_path
exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']

# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'

# If true, `todo` and `todoList` produce output, else they produce nothing.
todo_include_todos = False

# Enable codeauthor and sectionauthor directives
show_authors = True


# -- Options for HTML output ----------------------------------------------

# The theme to use for HTML and HTML Help pages.  See the documentation for
# a list of builtin themes.
#
html_theme = 'sphinx_rtd_theme'

# Theme options are theme-specific and customize the look and feel of a theme
# further.  For a list of options available for each theme, see the
# documentation.
#
# html_theme_options = {}

# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']

# Custom sidebar templates, must be a dictionary that maps document names
# to template names.
#
# This is required for the alabaster theme
# refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
html_sidebars = {
    '**': [
        'relations.html',  # needs 'show_related': True theme option to display
        'searchbox.html',
    ]
}

# Make :manpage directive work on HTML output.
manpages_url = 'https://manpages.debian.org/{path}'

# -- Options for HTMLHelp output ------------------------------------------

# Output file base name for HTML help builder.
htmlhelp_basename = 'Scapydoc'


# -- Options for LaTeX output ---------------------------------------------

latex_elements = {
    # The paper size ('letterpaper' or 'a4paper').
    #
    'papersize': 'a4paper',

    # The font size ('10pt', '11pt' or '12pt').
    #
    'pointsize': '11pt',

    # Additional stuff for the LaTeX preamble.
    #
    # 'preamble': '',

    # Latex figure (float) alignment
    #
    # 'figure_align': 'htbp',
}

# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
#  author, documentclass [howto, manual, or own class]).
latex_documents = [
  ('index', 'Scapy.tex', 'Scapy Documentation',
   'Philippe Biondi and the Scapy community', 'manual'),
]


# -- Options for manual page output ---------------------------------------

# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
    (master_doc, 'scapy', 'Scapy Documentation',
     ['Philippe Biondi and the Scapy community'], 1)
]


# -- Options for Texinfo output -------------------------------------------

# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
#  dir menu entry, description, category)
texinfo_documents = [
    (master_doc, 'Scapy', 'Scapy Documentation',
     'Philippe Biondi and the Scapy community', 'Scapy',
     '',
     'Miscellaneous'),
]

Good job for finding this out, I didn't know it was builtin.