Hi I would like to extend python so that you could create hiercical
tree structures (XML, HTML etc) easier and that resulting code would be
more readable.
The syntax i would like is something like the below:
# Example creating html tree
'*!*' is an operator that creates an new node
'*=*' is an operator that sets an attribute.
bodyNode = body()
*!* bodyNode:
*=* color = blue
*=* bg = white
for i in headings:
*!* H1(heading[i]):
This would translate to something like this in python:
bodyNode = body()
if True:
bodyNode.attr['color'] = blue
bodyNode.attr['bg'] = white
for i in headings:
if True:
bodyNode.append(H1(heading[i]))
I think that with the added syntax you get better overview on how your
tree looks like.
But the thing is how to implement my added syntax. I dont want to mess
with Python source code to add the syntax. So I searched a bit on the
net and think there might be three alternatves.
1. MetaClasses. I tried to understand them but my head almost exploded
:-). But my conclusion was that it is not possible with metaclasses.
Since this is a real syntax change.
2. Tokenize.py. I modify tokenize.py to recognize my new operators
'#!#' and '#=#' and then I write a parser that exports the code. This
option I understand somewhat how to implement. But I would reduce my
own code for the parser, so is there any parser that can handle
tokenize.py input? So that I could somehow write rules for my code.
3. Use PLY or any other python parser. Write rules for my language. But
would I need to write rules that can handle the whole python
languager? Then this seems to be overkill. I would just
like to recognize my added syntax and convert that. So I would really
like to have a rule file that handles python and then add rules for my
syntax. Are there any Python rule file for the python language and a
python parser for it? Then I could just add my syntax to the rule file
and be able to create the output.
I would be very thankfull for any hints or thougts on how to do it.
Best regards,
G
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