Unknown directive type "execute"

Newbie here trying to use the beta 0.7. I did a “jb create” and then edited the markdown.md file to take away the outer fence around the demonstration execute directive block, so that I could see code execution in action. Then I build and get:

Running Sphinx v2.4.0
loading pickled environment... done
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 1 source files that are out of date
updating environment: 0 added, 1 changed, 0 removed
reading sources... [100%] markdown                                                                                                                                                               
/Users/driscoll/Documents/fnc-book/jb/markdown.md:8: WARNING: Unknown directive type "execute".
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
writing output... [100%] markdown                                                                                                                                                                
generating indices...  genindexdone
writing additional pages...  searchdone
copying static files... ... done
copying extra files... done
dumping search index in English (code: en)... done
dumping object inventory... done
build succeeded, 1 warning.

I thought I might need to add kernel info, so I did jb myst init --kernel python3 markdown.md , which added a kernelspec header. Running build again gave me

Running Sphinx v2.4.0
loading pickled environment... done
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 1 source files that are out of date
updating environment: 0 added, 1 changed, 0 removed
Executing: markdown[100%] markdown                                                                                                                                                               

/Users/driscoll/Documents/fnc-book/jb/markdown.md:23: WARNING: Unknown directive type "execute".
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
writing output... [100%] markdown                                                                                                                                                                
generating indices...  genindexdone
writing additional pages...  searchdone
copying static files... ... done
copying extra files... done
dumping search index in English (code: en)... done
dumping object inventory... done
build succeeded, 1 warning.

It did change “reading sources” to “executing” the md file, but the execute block is gobbled with no output. What am I doing wrong?

[choldgraf]

good catch! I just opened up https://github.com/executablebooks/jupyter-book/pull/617 to fix this docs bug

[choldgraf]

cool, opened up in https://github.com/executablebooks/MyST-NB/issues/182