Create a loop that goes through a nested list that can be appended

Question

We're coding a password saver and I'm stuck on Nested List loops.

passwords = [["yahoo","XqffoZeo"],["google","CoIushujSetu"]]

if(choice == '2'): #Lookup at password
    print("Which website do you want to lookup the password for?")
    for keyvalue in passwords:
        print(keyvalue[0])
    passwordToLookup = input()

This is what I have so far. I now need to create a loop that gives the password and will work if passwords list is appended with more websites and their passwords.

Here's the whole of the code: I'm working through it a little at a time since it's an assignment and not a personal project.

import csv
import sys

#The password list - We start with it populated for testing purposes
passwords = [["yahoo","XqffoZeo"],["google","CoIushujSetu"]]


#The password file name to store the passwords to
passwordFileName = "samplePasswordFile"

#The encryption key for the caesar cypher
encryptionKey=16

#Caesar Cypher Encryption
def passwordEncrypt (unencryptedMessage, key):

#We will start with an empty string as our encryptedMessage
encryptedMessage = ''

#For each symbol in the unencryptedMessage we will add an encrypted symbol      into the enc sage
for symbol in unencryptedMessage:
    if symbol.isalpha():
        num = ord(symbol)
        num += key

        if symbol.isupper():
            if num > ord('Z'):
                num -= 26
            elif num < ord('A'):
                num += 26
        elif symbol.islower():
            if num > ord('z'):
                num -= 26
            elif num < ord('a'):
                num += 26

        encryptedMessage += chr(num)
    else:
        encryptedMessage += symbol

return encryptedMessage

def loadPasswordFile(fileName):

with open(fileName, newline='') as csvfile:
    passwordreader = csv.reader(csvfile)
    passwordList = list(passwordreader)

return passwordList

def savePasswordFile(passwordList, fileName):

with open(fileName, 'w+', newline='') as csvfile:
    passwordwriter = csv.writer(csvfile)
    passwordwriter.writerows(passwordList)



while True:
print("What would you like to do:")
print(" 1. Open password file")
print(" 2. Lookup a password")
print(" 3. Add a password")
print(" 4. Save password file")
print(" 5. Print the encrypted password list (for testing)")
print(" 6. Quit program")
print("Please enter a number (1-4)")
choice = input()

if(choice == '1'): #Load the password list from a file
    passwords = loadPasswordFile(passwordFileName)

if(choice == '2'): #Lookup at password
    print("Which website do you want to lookup the password for?")
    for keyvalue in passwords:
        print(keyvalue[0])
    passwordToLookup = input()

    ####### THIS IS WHERE I'm WORKING ####
#NOt supposed to change any of the base code just working on this part currently.

    for list in passwords:


    #Perameters: You will need to find the password that matches the website
    #You will then need to decrypt the password

    #1. Create a loop that goes through each item in the password list

    #2. Check if the name is found.  To index a list of lists you use 2 square bracket sets

    #3. If the name is found then decrypt it.  





print()
print()

Because I'm following the parameters given by the professor. We're not supposed to alter base code to make it cleaner because we "haven't covered that material yet." — Inky, Feb 27 '17 at 20:00

Nick Frost · Answer 1 · 2017-02-27T19:43:01.357

You can unpack the inner lists into two different variables instead of one, like this:

passwords = [["yahoo","XqffoZeo"],["google","CoIushujSetu"]]

if(choice == '2'): #Lookup at password
    print("Which website do you want to lookup the password for?")
    for key, _ in passwords:
        print(key)
    passwordToLookup = input().strip()
    for key, value in passwords:
        if key == passwordToLookup:
            print(value)

Create a loop that goes through a nested list that can be appended

1 Answers1