Welcome, guest | Sign In | My Account | Store | Cart

Traverse dotted attribute of an object using built-in function reduce (Python recipe) by Chaobin Tang (唐超斌)
ActiveState Code (http://code.activestate.com/recipes/578398/)

Making good use of reduce() to traverse dotted attribute of an object.

Python, 12 lines
Download
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
class Klass(object):
  
    def __getattr__(self, name):
        """
        Locate the function with the dotted
        attribute.
        """
        def traverse(parent, child):
            if instance(parent, str):
                parent = getattr(self, parent)
            return getattr(parent, child)
        return reduce(traverse, name.split('.'))
Tags: attributes, bif, recursive, reduce