Python-сообщество

#!/usr/bin/python
dicta={'a':{'aa':1,'bb':2}}
def findnode(data,keys):
  try:
    key=keys.pop(0)
  except IndexError:
    return data
  else:
    return findnode(data[key],keys)
def setnode(data,keys,val):
  try:
    key=keys.pop(0)
  except IndexError:
    print id(data)
    data=val
    print id(data)
  else:
    setnode(data[key],keys,val)
setnode(dicta,['a','bb'],221)
print findnode(dicta,['a','bb'])

dicta={'a':{'aa':1,'bb':2}}
def setnode(dct, parent, child, value):
    try:
        dct[parent][child]=value
    except KeyError:pass
setnode(dicta,'a','bb',221)
print dicta

dicta={'a':{'aa':1,'bb':{'aaa':333,'bbb':444}}}

dicta['a']['bb']['bbb']

dicta={'a':{'aa':1,'bb':{'aaa':333,'bbb':444}}}
def setnode(dct, tree, value):
    parent=dct
    try:
        for node in tree[:-1]:
            parent=parent[node]
        parent[tree[-1]]=value
    except KeyError:pass
setnode(dicta, ['a','bb','bbb'], 221)
print dicta
setnode(dicta, ['a','aa'], 'ff')
print dicta
setnode(dicta, ['a'], None)
print dicta

def setnode(d,keys,val):
    if len(keys) > 1:
        setnode(d[keys[0]],keys[1:],val)
    else:
        d[keys[0]] = val