How to move key and values from dictionary to list?

Question

I’m trying to get the key and value pair of "Brian" to the list "confirmed_users" but can only get the values of said dictionary. How can I get both?

state = True
confirmed_users = []
unconfirmed_users = {
    "Brian": {
        "Age": 21,
        "Size": 12,
        "username": "Danny. B"
    }
}
while state == True:
    task_confirming = input("Enter name to be confirmed: ")
    if task_confirming == "Brian":
        for key, value in unconfirmed_users.items():
            confirmed_users.append(unconfirmed_users["Brian"])
        del unconfirmed_users["Brian"]
        print(confirmed_users[0])
        print(unconfirmed_users)

Input:

Brian

Output:

{'Age': 21, 'Size': 12, 'username': 'Danny. B'}
{}

Asked By: pacemaker

||

Source

Answer 1

Several tips:

you create a new dictionary with the key "Brian" and the corresponding value and append it.
there is no need for looping over items
You can also use pop to delete the entrance of a dictionary

state = True
confirmed_users = []
unconfirmed_users = {
    "Brian": {
        "Age": 21,
        "Size": 12,
        "username": "Danny. B"
    }
}
while state == True:
    task_confirming = input("Enter name to be confirmed: ")
    if task_confirming == "Brian":
        confirmed_users.append({task_confirming: unconfirmed_users.pop(task_confirming)})
        print(confirmed_users[0])
        print(unconfirmed_users)

Answered By: Lucas M. Uriarte

Answer 2

Depends a little bit on the format you want.

confirmed_users.append( (key, value) )

will add a tuple with (string, dict)

("Brian" , {"Age": 21,"Size": 12,"username": "Danny. B"})

For adding a dict see Lucas answer.

A note on scalability: doing a username in confirmed_users search where confirmed_users is a list relatively slow.
Using a dict with all infos or a set of usernames will be much faster due to a hash lookup compared to looking at each element of a list.

Sidenote: This will perform a constant action for all items in the list and probably is not what you want 😉

for key, value in unconfirmed_users.items():
            confirmed_users.append(unconfirmed_users["Brian"])

Answered By: Daraan

How to move key and values from dictionary to list?

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