Preprocessing of input for the interactive interpreter?

[Larry Bates]

Stefan Salewski wrote:
> Hello,
> 
> I just start learning Python (ordered "Dive into Python" a week ago).
> 
> In the past I have used the Python interactive interpreter for some
> calculations instead of Linux command line tools like "bc" or "calc".
> 
> I wonder if it is possible to do a pre-processing of command strings in
> the interactive interpreter. (Not that I really need it, and currently my
> Python skills are far away to manage this hack. But I am curious -- did
> some Google search yesterday, but did not find an answer. Yes, an extended
> interpreter called IPython exists -- this one seems to have this
> functionality, and I may use this one later.)
> 
> It is possible to convert input in this form (input hook?):
> 
> My custom input format:
> 
>>>> b := 10a + 0,1
> 
> Format send to interpreter after preprocessing:
> 
>>>> b = 10*a + 0.1
> 
> 
> Best regards
> 
> Stefan Salewski
> 

I'm no expert, but I'll bet that pyparsing module will be the answer to your 
question.

-Larry Bates