How to add numbers in a list, if some of the numbers are appended from user input?

Question

I made a simple working craps game with point and everything, but I wanted to implement betting. The idea is that the player will input a bet amount and the amount will be deducted from the player wallet and added onto the bet. Afterwards if the player won, the bet is returned including the winnings.

I set up a variable that takes user input, I then append the variable to a list. Afterwards I set up two other variables that add everything in the lists together by: sum().

CODE:

bet_numbers = []
bet = sum(bet_numbers)
user_input = input("How much would you like to bet?")
bet_numbers.append(user_input)
user_input_2 = input("How much would you like to bet?")
bet_numbers.append(user_input_2)
print(bet_numbers)
print(bet)

for example

user_input = input("How much would you like to bet?")
200
user_input = input("How much would you like to bet?")
300
result:
[200,300]
0

Answer 1

bet = sum(int(b) for b in bet_numbers)
print(bet)

You've never summed up bet_number after they were populated. Move the sum just before printing bet

Also, you're taking str inputs, so you need to convert them to int before summing

Answer 2

Your code has some errors

1. You are summing an empty list, because you call bet = sum(bet_numbers) right after you define bet_numbers = [] , and sum([])=0

2. Even if you were to call bet = sum(bet_numbers) after asking for bets, it wouldn't have worked since your elements of bet_numbers list will be strings, and you cannot sum strings. I tried it below and you can see it won't work

In [2]: sum(['2'+'2'])                                                          
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-2-b6e099608f0b> in <module>
----> 1 sum(['2'+'2'])

TypeError: unsupported operand type(s) for +: 'int' and 'str'

3. You are calling the same two lines twice, whereas you could use a for loop

Taking all this in consideration, your code can be much simplified as

bet_numbers = []

#Run a for loop twice
for i in range(2):
    #Ask for user input, convert to int and apppend to list
    user_input = int(input("How much would you like to bet?"))
    bet_numbers.append(user_input)

#Sum all items in bet_numbers lis
bet = sum(bet_numbers)
print(bet)

A sample output will be

How much would you like to bet?20
How much would you like to bet?30
50

Answer 3

Following the order of declaration bet is equal to 0 as it correctly did a sum of the bet_numbers items.

The solution would be to put bet = sum(bet_numbers) after asking the inputs from the players