Python dictionary array [closed]

Question

I would like to ask about a particular problem, I have encountered lately.

I have list containing items e.g.

list1 = ['library','book','room','author','description','genre','publish_date','price','title']

and dictionary containing keys and values, keys are items from list1 and values are its childs,e.g.

dictionary1 = {'room': ['book'], 'title': [], 'price': [], 'author': [], 'library': [ 'room', 'book'], 'book': ['author', 'title', 'genre', 'price', 'publish_date', 'description'], 'publish_date': [], 'genre': [], 'description': []}

Basically what i want to do is to go through items in dictionary1 and if value of certain key is also key with values, i want to add values of the value to the key.

For example:

'library': ['room','book']

book contains author, title, genre, price, publishdate, description.

And I want to add all these items to library key, so it would look like:

'library': ['room','book','author', 'title', 'genre', 'price', 'publish_date', 'description'], 'publish_date': [], 'genre': [], 'description': []] 

Answer 1

Pseudocode:

dictionary = ...//your input
dictionaryOut={}

list=[]

for key, value in dictionary
    dictionaryOut[key] = copy(value)

    if length(value[0]):
        list=[value[0]]

    while not empty(list):
        list.append(dictionary(list[0]))
        dictionaryOut[key].append(dictionary(list.pop(0))

This should do it as long as we are talking python and appending to value will actually update the list in your dictionary.