Flexdown does not support Advance Latex math

[sadsquirrel369]

I am trying to build a blog of my own using this website as an example. When parsing more advance latex to the markdown function $\sum_{x^2+1}$ the system breaks (\sum_{x^2+1})

`
Traceback (most recent call last):
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/utils.py", line 45, in evaluate_templates
eval_result = str(eval(match, env, env))
File "", line 1
{x^2+1
^
SyntaxError: '{' was never closed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/bin/reflex", line 8, in
sys.exit(cli())
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/typer/main.py", line 326, in call
raise e
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/typer/main.py", line 309, in call
return get_command(self)(*args, **kwargs)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/click/core.py", line 1157, in call
return self.main(*args, **kwargs)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/typer/core.py", line 723, in main
return _main(
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/typer/core.py", line 193, in _main
rv = self.invoke(ctx)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/click/core.py", line 1688, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/click/core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/typer/main.py", line 692, in wrapper
return callback(**use_params)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/reflex/reflex.py", line 260, in run
_run(env, frontend, backend, frontend_port, backend_port, backend_host, loglevel)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/reflex/reflex.py", line 186, in _run
prerequisites.get_compiled_app()
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/reflex/utils/prerequisites.py", line 288, in get_compiled_app
app_module = get_app(reload=reload)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/reflex/utils/prerequisites.py", line 261, in get_app
app = import(module, fromlist=(constants.CompileVars.APP,))
File "/Users/kobus/Documents/Private/Codebase/Blog/Blog/Blog.py", line 18, in
app.add_page(
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/reflex/app.py", line 500, in add_page
component = self._generate_component(component)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/reflex/app.py", line 422, in _generate_component
return component if isinstance(component, Component) else component()
File "/Users/kobus/Documents/Private/Codebase/Blog/Blog/utils/template.py", line 48, in wrapper
contents(*children, **props),
File "/Users/kobus/Documents/Private/Codebase/Blog/Blog/pages/blog/blog.py", line 15, in
lambda doc=document: page(doc, route)
File "/Users/kobus/Documents/Private/Codebase/Blog/Blog/pages/blog/page.py", line 130, in page
xd.render(document, "blog.md"),
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/flexdown.py", line 205, in render
f"\n{block.get_content(env)}"
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/blocks/block.py", line 110, in get_content
return "\n".join(self.get_lines(env))
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/blocks/block.py", line 95, in get_lines
lines = [
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/blocks/block.py", line 96, in
self._apply_transforms(line, env)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/blocks/block.py", line 79, in _apply_transforms
line = transform(line, env)
File "/opt/homebrew/Caskroom/miniforge/base/envs/Blog/lib/python3.10/site-packages/flexdown/utils.py", line 49, in evaluate_templates
raise ValueError(f"Failed to evaluate expression '{match}'") from e
ValueError: Failed to evaluate expression '{x^2+1'
`

[picklelo]

@sadsquirrel369 Currently flexdown looks for {expr} and fills it in with Python expressions. I need to make the escape a double brace instead to avoid this, but you can escape it by doing \{expr} - for example

Sum is  $\sum_\{x^2+1}$

That makes it compile for me, but sum still doesn't render. Maybe something missing without our katex implementation