roslaunch-to-dot.py 文件源码

def __parseArg(self, arg):
        '''Parse the given arg element to get (and resolve) its name
        and value.

        * arg -- the arg element

        '''
        name = self.__getAttribute(arg, self.NameAttribute)

        # Grab the default and standard value
        default = arg.attrib.get(self.DefaultAttribute, None)
        value = arg.attrib.get(self.ValueAttribute, default)

        # Any of these attributes may have substitution arguments
        # that need to be resolved
        name = self.__resolveText(name)

        # Only resolve the value if it is defined
        if value is not None:
            value = self.__resolveText(value)

        return name, value

    ##### ROS launch substitution argument related functions