Routine for prefixing '>' before every line of a string

[Sanjay]

Hi All,

Is somewhere a routine useful to convert a string to lines of maxsize,
each prefixed with a '>'. This is a typical requirement for 'keeping
existing text while replying to a post in a forum'.

It can be developed, but if something obvious is already there(I being
new to python might not be aware), than it would be great just to reuse
it!

thanks
sanjay