CODEWITHSUNDEEP
python
palmolive
palmolive

Reputation: 21

How to save a input into the code permanently

I'm trying to save a username register input into a list permanently (as in it will still be there even after I close the file) where I can then access it. I'm trying to create a login system. Sorry if this question sounds very idiotic because I'm an absolute newbie to coding.

Example: 

list_of_users = ['Elias', 'James']
new_user = None
new_user = input('Create new user: ')
list_of_users.append(new_user)

Upvotes: 2

Views: 196

Answers (2)

Yaakov Bressler
Yaakov Bressler

Reputation: 12018

I'd suggest loading and saving your list to a local txt file:

if os.path.isfile("my_list.txt"):
    # Import your list
    list_of_users = open("my_list.txt","r").read().split("\n")
else:
    list_of_users = []

# Ask for new users
new_user = input('Create new user: ')

list_of_users.append(new_user)

# Save your list:
with open("my_list.txt","w") as f:
    f.write("\n".join(list_of_users))

Upvotes: 0

modesitt
modesitt

Reputation: 7210

You can use the builtin python module, shelve to give you dict like syntax for your mini-"database". This will let you save arbitrary python objects to it (at least pickleable ones). 

import shelve 

db = shelve.open(".db")

users = db.get("users", [])
users.append(input("Create new user: "))
...
db["users"] = users

db.close()

Upvotes: 1

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