I much prefer:

Alternative Ideas

Instead of backticks for example t'...' could be used.

instead of a new syntax being introduced.

It would be great to consider a variation of this, where `t` is a normal function in scope that takes the proposed class attributes as arguments, and simply returns a new object.

Something similar to:

def html(raw_str, parts):

    escaped = []

    for part, is_substitute in parts:

        if is_substitute:

            escaped.append(html_escape(part))

        else:

            escaped.append(part)

   return MarkupSafe("".join(escaped))

With the idea that:

name = 'Bob <the rock>'

fragment = html'Hello: <b>{name}</b>'

results in fragment being:  MarkupSafe("Hello: <b>Bob &lt;the rock&gt;</b>")

----

The equivalent for SQL could return a `Statement` object with appropriate placeholders used.

If you don't like this approach, it would be nice to include it in the alternate/rejected sections.

Thanks

Steve