parsing an Excel formula with the re module

[vsoler]

On 5 ene, 19:35, MRAB <pyt... at mrabarnett.plus.com> wrote:
> vsoler wrote:
> > Hello,
>
> > I am acessing an Excel file by means of Win 32 COM technology.
> > For a given cell, I am able to read its formula. I want to make a map
> > of how cells reference one another, how different sheets reference one
> > another, how workbooks reference one another, etc.
>
> > Hence, I need to parse Excel formulas. Can I do it by means only of re
> > (regular expressions)?
>
> > I know that for simple formulas such as "=3*A7+5" it is indeed
> > possible. What about complex for formulas that include functions,
> > sheet names and possibly other *.xls files?
>
> > For example    "=Book1!A5+8" should be parsed into ["=","Book1", "!",
> > "A5","+","8"]
>
> > Can anybody help? Any suggestions?
>
> Do you mean "how" or do you really mean "whether", ie, get a list of the
> other cells that are referred to by a certain cell, for example,
> "=3*A7+5" should give ["A7"] and "=Book1!A5+8" should give ["Book1!A5"]?

I'd like to know how to do it, should it be possible.

Vicente