Le 25/07/2014 20:37, kilon alios a �crit :

I don't understand how to use aClass definition from workspace nor I understand your selector message. 

(aClass compiledMethodAt: self selector) sourceCode , self would imply that i try to operate this from inside another class with self selector being the method itself at the time executed ?

No, just that you can write:

(Object compiledMethodAt: #printString) sourceCode

That's me not sanitizing my code samples (lifting it from the AltBrowser)

However because I try to parse pharo syntax to python code, the classes that I am parsing are unrelated to the parser class itself  so I don't see how self selector would be relevant here. 

I also don't understand 

    ast := RBParser parseMethod: aTarget text asString onError: [ :msg :pos | ^ self ].
    ast doSemanticAnalysisIn: self sourceClass

what is aTarget ?

Ok, as above, it should be understood as:

ast := RBParser parseMethod: (Object compiledMethodAt: #printString) onError: [ :msg :ps | ].
ast doSemanticAnalysisIn: self sourceClass.