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Luiz Villalba
Luiz Villalba

Reputation: 149

Edit list element in multilist - Python

I am using python 3.x, I have the following problem, using the keyboard the user enters certain data and fills N lists to create a contact list, then in a list I collect all the data of the lists, I need to modify the data of each list, (I already have it, I modify the data of a list with a specific value using a for) Example, Names list, I modify Andrew's name, but in the Contacts list, there is all Andrew's information (phone, mail, etc), but I just need to modify in the Contacts list, the value of Andrew I have all this list:

names = []
surnames = []
phones = []
emails = []
addresses = []
ages = []
salaries = []
genres = []
contacts = []
# and use the append to add the data into the contacts list
contacts.append ([names, surnames, phone numbers, emails, addresses, ages, salaries, genders])

Then I update the info of one contact

search = input(Fore.LIGHTBLUE_EX + "Type the name of the contact you want update: ")
    for i in range(len(names)):
        if (names[i] == search):
                try:
                    names[i] = input(Fore.MAGENTA + "Type the New name: ")
                    names[i] = nombres[i].replace(" ", "")
               if names[i].isalpha() == True:
                    print(Fore.GREEN + "Already saved, congrats.")
                    pause= input(Fore.LIGHTGREEN_EX + "Press enter to exit")

But I dont know how to update the name in the List of contacts.

Upvotes: 1

Views: 287

Answers (1)

Jacob Lee
Jacob Lee

Reputation: 4670

When you call contacts.append(), you add a list of lists to a list, so your contacts list will look something like this:

contacts = [[[names[0], names[1], ...], [...], [...]]]

It's unnecessary to have a list of one item nested in another list, so I would just call contacts.append() and pass each list (names, surnames, etc.) to the method, which allows for easier indexing.

Since the list names would be the first item in the list contacts (contacts[0]), you could do one of two things (there may be more, but these are off the top of my head):

  1. Reassign the specific index to a new value, using nested-list indexing (contacts[0][0] = "updated name" would update the first item of the names list to "update name")
  2. Reassign the entire nested list to a new list (contacts[0] = new_name_list would reassign contacts[0], formerly the names list, to new_name_list)

On a side note: In this case, I would recommend dictionaries over lists, as it will be easier to keep track of what is being reassigned/modified.

contacts = {
    "names": names,
    "surnames": surnames,
    ...
}

Doing this will make it more clear which list your are referring to; contacts[0] doesn't give much information, but contacts["names"] informs readers that you are referring to the names list. This is solely for cleaner code; there isn't much difference in functionality.

Upvotes: 1

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