From 21faa5d187b2cccf2a48315d183c2863ed2cdc50 Mon Sep 17 00:00:00 2001
From: Sylvain Gugger <sylvain.gugger@gmail.com>
Date: Tue, 7 May 2019 13:47:30 +0000
Subject: [PATCH] Fix #2045

---
 fastai/gen_doc/nbdoc.py  | 10 +++++++---
 fastai/gen_doc/nbtest.py |  4 ++--
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/fastai/gen_doc/nbdoc.py b/fastai/gen_doc/nbdoc.py
index 5daf55bb34..7161d2a138 100644
--- a/fastai/gen_doc/nbdoc.py
+++ b/fastai/gen_doc/nbdoc.py
@@ -1,6 +1,6 @@
 "`gen_doc.nbdoc` generates notebook documentation from module functions and links to correct places"
 
-import inspect,importlib,enum,os,re
+import inspect,importlib,enum,os,re,nbconvert
 from IPython.core.display import display, Markdown, HTML
 from nbconvert import HTMLExporter
 from IPython.core import page
@@ -12,7 +12,7 @@
 from .nbtest import get_pytest_html
 from ..utils.ipython import IS_IN_COLAB
 
-__all__ = ['get_fn_link', 'link_docstring', 'show_doc', 'get_ft_names',
+__all__ = ['get_fn_link', 'link_docstring', 'show_doc', 'get_ft_names', 'md2thml'
            'get_exports', 'show_video', 'show_video_from_youtube', 'import_mod', 'get_source_link',
            'is_enum', 'jekyll_note', 'jekyll_warn', 'jekyll_important', 'doc']
 
@@ -123,6 +123,10 @@ def show_doc(elt, doc_string:bool=True, full_name:str=None, arg_comments:dict=No
     if markdown: display(Markdown(doc))
     else: return doc
 
+def md2html(md):
+    if nbconvert.__version__ < '5.5.0': return HTMLExporter().markdown2html(md)
+    else: return HTMLExporter().markdown2html(defaultdict(lambda: defaultdict(dict)), md)
+    
 def doc(elt):
     "Show `show_doc` info in preview window along with link to full docs."
     global use_relative_links
@@ -131,7 +135,7 @@ def doc(elt):
     md = show_doc(elt, markdown=False)
     if is_fastai_class(elt):
         md += f'\n\n<a href="{get_fn_link(elt)}" target="_blank" rel="noreferrer noopener">Show in docs</a>'
-    output = HTMLExporter().markdown2html(md)
+    output = md2html(md)
     use_relative_links = True
     if IS_IN_COLAB: get_ipython().run_cell_magic(u'html', u'', output)
     else:
diff --git a/fastai/gen_doc/nbtest.py b/fastai/gen_doc/nbtest.py
index 178a4d624d..f4ee035581 100644
--- a/fastai/gen_doc/nbtest.py
+++ b/fastai/gen_doc/nbtest.py
@@ -25,7 +25,7 @@ def show_test(elt)->str:
 def doctest(elt):
     "Inline notebook popup for `show_test`"
     md = build_tests_markdown(elt)
-    output = HTMLExporter().markdown2html(md)
+    output = nbdoc.md2html(md)
     try:    page.page({'text/html': output})
     except: display(Markdown(md))
 
@@ -54,7 +54,7 @@ def tests2md(tests, type_label:str):
 
 def get_pytest_html(elt, anchor_id:str)->Tuple[str,str]:
     md = build_tests_markdown(elt)
-    html = HTMLExporter().markdown2html(md).replace('\n','') # nbconverter fails to parse markdown if it has both html and '\n'
+    html = nbdoc.md2html(md).replace('\n','') # nbconverter fails to parse markdown if it has both html and '\n'
     anchor_id = anchor_id.replace('.', '-') + '-pytest'
     link, body = get_pytest_card(html, anchor_id)
     return link, body