Contents

require 'rupy/blankobject'
require 'singleton'

module Rupy
    # A singleton object providing access to the python \_\_main\_\_ and
    # \_\_builtin\_\_ modules.  This can be conveniently accessed through the
    # already instaniated PyMain constant.  The \_\_main\_\_ namespace is
    # searched before the \_\_builtin\_\_ namespace. As such, naming clashes will
    # be resolved in that order.
    #
    # ## Block Syntax
    # The PyMainClass object provides somewhat experimental block support.  A
    # block may be passed to a method call and the object returned by the
    # function call will be passed as an argument to the block.
    class PyMainClass < BlankObject
        include Singleton
        attr_writer :main, :builtin

        #@return [RubyPyModule] a proxy object wrapping the Python \__main\__
        #namespace.
        def main
            @main ||= Rupy.import "__main__"
        end

        #@return [RubyPyModule] a proxy object wrapping the Python \__builtin\__
        #namespace.
        def builtin
            @builtin ||= Rupy.import "__builtin__"
        end

        #Delegates any method calls on this object to the Python \__main\__ or
        #\__builtin\__ namespaces. Method call resolution occurs in that order.
        def method_missing(name,*args,&block)
            proxy = if main.respond_to?(name)
                        main
                    elsif builtin.respond_to?(name)
                        builtin
                    else
                        super(name, *args)
                    end
            result = if proxy.is_real_method?(name)
                         proxy.__send__(name, *args)
                     else
                         proxy.__send__(:method_missing, name,*args)
                     end
            block ? block.call(result) : result
        end
    end

    PyMain = PyMainClass.instance
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
rupy-0.4.2	lib/rupy/pymainclass.rb
rupy-0.4.1	lib/rupy/pymainclass.rb
rupy-0.4.0	./lib/rupy/pymainclass.rb