temporarily enable a character-map

Hi,

Is there a way to temporarily enable an XSLT2 character-map.  My
use-case is generating
python code which will contain string literals.  Some of the code I'm
generating looks like
this...

Check_Range_IADAS001_0 = make_range_check("Check_Range_IADAS001_0",
"IADAS001", "IGQS572", GT, "10", "Max = 10")

This particular line is fine but the string "Max = 10" is coming
directly from the input document
and it might contain things which need to be escaped in a python
literal (e.g. ", ' etc).  I thought
I could use character-maps but my understanding is that you have to
apply one to an entire final
result tree so if  I were to have....

  <xsl:character-map name="python-map">
	<xsl:output-character character="&#34;" string="\&#34;"/>
  </xsl:character-map>

It would escape all instances of "&#34;" in the output which is not what I want.

Am I trying to use the wrong tool here?

Many Thanks,
Andy