Python: Pop from Empty List

Python: pop from empty list

You're on the right track.

if exporterslist: #if empty_list will evaluate as false.
    importer = exporterslist.pop(0)
else:
    #Get next entry? Do something else?

Python: pop from empty list?

Your approach wasn't working because index goes out of range instead you could do the following code to read and sort the numbers present in the file.

from sys import argv    
with open(argv[1],'r') as myfile:
        for line in myfile:
            print (sorted(map(int, line.split(','))))

If your file contains comma seperated values.

Pop from Empty List error during Black Jack

Ok, so thanks to Jeff H for pointing out that the call for the card deal was inside an infinite loop, even though I couldn't fix the problem by breaking the loop itself, I did figure out how to start off the initial deal by absorbing it into the game_check statement above, like so:

while game_on == True:

    game_check = input('Would you like to play Black Jack, Y/N? ').lower()

    if game_check == 'y':
        round_counter = 0
        dealer_name = 'Klaus the Dealer'
        dealer = Dealer(dealer_name)
        player_name = input("Player One, what is your name? ")
        player_one = Player(player_name)
        print(f"Nice to meet you {player_name}, you'll be playing against {dealer_name}\n")
        print(player_one)
        print(dealer)
        print("Let's play Black Jack!\n")
        playing = True
        for x in range(2):
            player_one.add_cards(game_deck.deal_one())
            dealer.add_cards(game_deck.deal_one())

This won't account for having to deal cards into the hand later while in another while loop, but it will fix the first issue.

Pop from empty list

By default, the timeit method runs a million times. However, your list is only 10000 items long. So when timeit runs, the first 10000 times will happily pop, but the 10001 iteration will fail. You can set the number of times explicitly:

popz.timeit(n=10000)

but ... this is a really tricky timing situation since you want to time how long it takes to .pop, but the size of your list is constantly changing. If you're looking for the asymptotic performance, you probably could verify that .pop(0) has asymptotic performance of O(N). However concrete times are going to be hard to come by since you either have to time the amount of time it takes to create the list along with the .pop, or you're list is constantly changing while you're timing it. Neither of these is ideal ... But I guess that's the problem with trying to time non-idempotent methods...

Pop from Empty list error

I suspect maybe your indentation is wrong for InsertIntostacks(lst1), and that's the problem.

Try ensuring that InsertIntostacks(lst1) is properly aligned with the for loop, meaning it executes after the loop, not within it. Right now it's executing during every iteration of the loop, including the first one, where lst is indeed empty.

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