automatic code generation

[box]

I'm trying to a write a script to automatically generate some .cpp & .h
files.  I have the templates in external files which look something like
this:

void ${NAME}Panel::showEvent(QShowEvent *e) {
    ...code....
}

I want to be able to run my script, have it read the contents of the files
while replacing ${NAME} with a variable that is defined elsewhere in my
script.  My issue is that I can't get NAME to bind to anything in the .cpp
file I generate.  By this I mean that if ${NAME} evaluates to Foo in the
script, when I output the file I still get

void ${NAME}Panel::showEvent(QShowEvent *e) {
    ...code....
}

when what I want is

void FooPanel::showEvent(QShowEvent *e) {
    ...code....
}

Any suggestions? 
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