Xpath for python dict

editbyxpath.py

def editByXpath(dict, path, val):
	try:
		if path[0].isdigit():
			p = int(path[0])
		else:
			p = path[0]
		if len(path) == 1:
			dict[p] = val
			return
		else:
			editByXpath(dict[p], path[1:], val)
	except:
		raise KeyError()

foo = {
  'spam':'eggs',
  'morefoo': [{
               'bar':'soap',
               'morebar': {
                           'bacon' : 'narhwall'
                           }
              },
              'bla'
              ]
   }

editByXpath(foo, ['morefoo', '0', 'morebar', 'bacon'], 'zlo')