Xpath like query for nested python dictionaries

Question

Is there a way to define a XPath type query for nested python dictionaries.

Something like this:

foo = {
  \'spam\':\'eggs\',
  \'morefoo\': {
               


        

Answer 1

def Dict(var, *arg, **kwarg):
  """ Return the value of an (imbricated) dictionnary, if all fields exist else return "" unless "default=new_value" specified as end argument
      Avoid TypeError: argument of type 'NoneType' is not iterable
      Ex: Dict(variable_dict, 'field1', 'field2', default = 0)
  """
  for key in arg:
    if isinstance(var, dict) and key and key in var:  var = var[key]
    else:  return kwarg['default'] if kwarg and 'default' in kwarg else ""   # Allow Dict(var, tvdbid).isdigit() for example
  return kwarg['default'] if var in (None, '', 'N/A', 'null') and kwarg and 'default' in kwarg else "" if var in (None, '', 'N/A', 'null') else var

foo = {
  'spam':'eggs',
  'morefoo': {
               'bar':'soap',
               'morebar': {'bacon' : 'foobar'}
              }
   }
print Dict(foo, 'morefoo', 'morebar')
print Dict(foo, 'morefoo', 'morebar', default=None)

Have a SaveDict(value, var, *arg) function that can even append to lists in dict...