Python filter and code block woes

[madsmh]

I have this MArkdown file made with Obsidian which contains a code block "```tikz"
I have been trying to adapt an an example of python filters form pandocfilers, and have written this:

`import pandocfilters

def tikzjax(key, value, format, _):
if key == 'RawBlock':
[fmt, code] = value
if fmt == 'tikz':
return pandocfilters.Para(["Ha!"])

if name == "main":
pandocfilters.toJSONFilter(tikzjax)
`
My intention was to be able to detect tikz codeblocks and manipulate them. The above script was supposed to simply replace the code block with the text "Ha!"However, it does not do anything. Any help on where I am going wrong would be greatly appreciated.

[jgm]

You want to match on CodeBlock, not RawBlock, as this will be parsed as a code block.

[madsmh]

Hi, thank you for your reply!
My script now looks like

import pandocfilters

def tikzjax(key, value, format, _):
    if key == 'CodeBlock':
        [fmt, code] = value
        if fmt == 'tikz':
            return pandocfilters.Para(["Ha!"])

if __name__ == "__main__":
    pandocfilters.toJSONFilter(tikzjax)

but it still does not affect the tikz code blocks. I am using the command:

pandoc.exe -f markdown -t latex --filter ..\latex_filter.py -s '.\output.md' -o test.tex

Best, Mads

[jgm]

You'll have to do some debugging. See what value fmt has, for one...
I'm sorry, even though I wrote pandocfilters, it was ages ago and I don't remember the details.

[madsmh]

HI again,

import pandocfilters

def tikzjax(key, value, format, _):
    if key == 'CodeBlock':
        [fmt, code] = value
        if fmt[1} == ['tikz']:
            ## .....

if __name__ == "__main__":
    pandocfilters.toJSONFilter(tikzjax)

worked.

Best, Mads