GeneralDescription

General Description of Python Methods

Python Methods are a subclass of SimpleItem?. Aside from the standard Security view, they have a Proxy role view, a "Try It" view which executes the method, and an editing view.

Their important attributes are _params and _body. Whenever one of these is changed, the Python Method passes its id, _params, and _body are to CodeBlock subclass constructor GuardedBlock. If GuardedBlock is able to compile the function:

    def {id}({_params}):
     {_block}

then it stores a tuple containing the pieces of the compiled function as _t. When the Python Method is called, it reconstructs the function from the stored tuple, providing it with a restricted set of builtin functions and access to the standard DTML functions through _.

The Python Method exposes the function signature to ZPublisher?. It binds aq_parent.this() if the first argument is self and one positional argument is missing.