Examples: query, "exact match", wildcard*, wild?ard, wild*rd
Fuzzy search: cake~ (finds cakes, bake)
Term boost: "red velvet"^4, chocolate^2
Field grouping: tags:(+work -"fun-stuff")
Escape special characters +-&|!(){}[]^"~*?:\ - e.g. \+ \* \!
Range search: properties.timestamp:[1587729413488 TO *] (inclusive), properties.title:{A TO Z}(excluding A and Z)
Combinations: chocolate AND vanilla, chocolate OR vanilla, (chocolate OR vanilla) NOT "vanilla pudding"
Field search: properties.title:"The Title" AND text
Custom CSS blocks or stylesheets in templates

Using the Python BDK, I am looking to add custom formatting to my MessageML/Jinja2 templates with CSS.

  1. After doing some testing, I see that I can add inline styles, which is good, but not robust enough for our design.
	<div style="background-color:red;">...</div>
  1. I don't seem to be able to add style blocks without the app throwing an exception.
		.bg-red {
			background-color: red;
	<div class="bg-red">...</div>
  1. Ideally, I would like to be able to add a custom stylesheet.
<link rel="stylesheet" type ="text/css" href="./static/css/custom.css">

Is there a way to acheive the number 3 method? If not, is there a way to achieve the number 2 method?

Votes Newest


Unfortunately, only inline styles like in your point #1 are currently allowed within the MessageML specification.

One way to mitigate this is to use a templating engine so that style definitions can be reused.

<!-- resources/hello.jinja2 -->
<div style="{{ styles.abc }}">hello</div>
<div style="{{ styles.def }}">goodbye</div>
<div style="{{ styles.abc }}">hello again</div>
from jinja2 import Template


async def hello(context: CommandContext):
    styles = {
        "abc": "background:blue",
        "def": "background:red"
    template = Template(open('resources/hello.jinja2').read(), autoescape=True)
    message = template.render(styles=styles)
    await bdk.messages().send_message(context.stream_id, message)

Not the most elegant solution but hopefully it might help a little.

Posted 2 years ago
Edited 2 years ago
Yong Sheng Tan
39 × 2 Administrator