pywalk allows you to specify a function that will walk over a Python abstract
syntax tree in Racket, with its structure as defined in the pysx (Python to
S-Expressions) tool.
To install, use:
$ raco pkg install
To do a site-wide install for all users, use:
$ sudo raco pkg install --scope installation
To import the package, use:
(require pywalk)
To transform all statements in a module once, use:
(walk-module <module> #:transform-stmt <transformer>)
To repeatedly transform the statements in a module until the module stops changing, use:
(walk-fix <module> #:transform-stmt <transformer>)
A <transformer> needs to meet the following specification:
<transformer> : <stmt> -> list of <stmt>
That is, a transformer can convert a single statement into several statements.
By default, the transformation is applied top-down.
To transform statements in a bottom-up fashion, use the #:transform-stmt/bu
parameter instead.
Change walk-fix to walk-module/fix.