On Dec 7, 3:23 pm, MonkeeSage <[EMAIL PROTECTED]> wrote: > A quick question about how python parses a file into compiled > bytecode. Does it parse the whole file into AST first and then compile > the AST, or does it build and compile the AST on the fly as it reads > expressions? (If the former case, why can't functions be called before > their definitions?) > > Thanks, > Jordan
Python uses a highly optimized table based LL(1) parser to create a syntax tree. In Python 2.5 it transforms the concrete syntax tree ( CST ) into an AST before compilation. Before that it compiled the CST directly. I'm not sure what you are asking for ( in parentheses )? Parser actions or preprocessing the tree? The latter is definitely possible and you can build your own compilation machinery using the parser module and the compile function. Kay -- http://mail.python.org/mailman/listinfo/python-list
