Traceback (most recent call last):


 "/home/dafne/anaconda2/envs/nlppln3/lib/python3.6/runpy.py", line 183, in _run_module_as_main

mod_name, mod_spec, code = _get_module_details(mod_name, _Error)


 "/home/dafne/anaconda2/envs/nlppln3/lib/python3.6/runpy.py", line 153, in _get_module_details

code = loader.get_code(mod_name)
AttributeError: 'Py2Fixer' object has no attribute 'get_code'

Traceback (most recent call last):


 "/Users/fperez/local/conda/lib/python3.7/site-packages/sphinx/events.py", line 110, in emit

results.append(listener.handler(self.app, *args))


 "/Users/fperez/.local/lib/python3.7/site-packages/jupyter_book/toc.py", line 175, in add_toc_to_sphinx

_check_toc_entries([toc])


 "/Users/fperez/.local/lib/python3.7/site-packages/jupyter_book/toc.py", line 376, in _check_toc_entries

_check_toc_entries(section[section_kind])


 "/Users/fperez/.local/lib/python3.7/site-packages/jupyter_book/toc.py", line 376, in _check_toc_entries

_check_toc_entries(section[section_kind])


 "/Users/fperez/.local/lib/python3.7/site-packages/jupyter_book/toc.py", line 356, in _check_toc_entries

for key in section.keys():
AttributeError: 'str' object has no attribute 'keys'
