auto-assign | Probot app that adds reviewers | Continous Integration library

This is a variation of an older question (linked below), that I phrased poorly so doesn't adequately address my problem.

BACKGROUND

Suppose there is an apple basket with apples, each of which is an object with a size attribute, and in this particular basket, we have 3 apples: [{size:'S'}, {size:'M'}, {size:'L'}]

In the shopping process, each time a customer adds an apple to the cart, they are given the option to select a size, but importantly, they do not have to select a size, it is an optional selector.

I'm trying to write a method, remaining_options that maximizes the maximum number of options a customer is shown when they add an apple to their cart, given their history of past selections. The fact that the size selection is optional is very important. Consider these 2 examples:

Example A: Customer selects an option

1. Customer adds 1st apple to cart
2. Customer sees prompt Please make a size selection (optional): [S, M, L]
3. Customer decides to select S
4. Customer adds 2nd apple to cart
5. Customer sees prompt Please make a size selection (optional): [M, L]

Example B: Customer does NOT select an option

1. Customer adds 1st apple to cart
2. Customer sees prompt Please make a size selection (optional): [S, M, L]
3. Customer skips this step
4. Customer adds 2nd apple to cart
5. Customer sees prompt Please make a size selection (optional): [S, M, L]

In Example B, because the customer did NOT select an option, the full set of options available is still shown. The code does not arbitrarily "remove" an apple from the option-set. In other words, this method remaining_options is not responsible for calculating remaining quantity, only remaining options, which it tries to maximize.

NOTE: Of course, even though this method doesn't calculate quantity, upon real world checkout, inventory is adjusted for the next customer, again via a different method. I.e., assuming that in the examples above, customer does not make a size selection for the 2nd apple, then upon checkout...

• Example A, customer will receive 1 S apple and a 2nd apple that's either M or L, as randomly selected by other code. If customer receives [S,M], then the next customer that orders an apple will only be able to add 1 apple and remaining_options will only return [L]
• Example B, customer will receive 2 random apples, could be [S,M], [M,L], [S,L], as randomly selected by other code. If customer receives [S,L], then the next customer that orders an apple will only be able to add 1 apple and remaining_options will only return [M]

COMPLEXITY

The challenge is I want remaining_options to work for any given number of possible attributes (size,color,price, etc.) on the apple object, and any number of options for such attributes. And since selections are optional, user can decline to select size,color,price,etc., or select 1 (e.g., only size) or 2 (e.g., size and price) and etc.

With this complexity, it's important that the code not treat the process of adding an apple to the cart as an independent process, where the remaining_options is calculated by options in basket minus the last option selected.

The code should instead look at all the apples in the customer's cart, whether or not an option has been selected for each, and then calculating the maximum number of remaining_options

The solutions in the previous posted question didn't work because they did the former, i.e., treated adding each apple as an independent process that removed an option from the basket.

Here's an example to clarify. Suppose the basket of 3 apples looks like this:

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I've spend my whole evening on this. guess it is just I missed a stupid step. Here is the procedure I followed:

1. create an aws vpc 10.0.0.0/24;
2. create an aws internet gateway and associate it with the VPC;
3. create a subnet in the VPC 10.0.0.0/26;
4. Add inbound rule to VPC ACL to allow SSH, HTTP, HTTPS from all IPV4 sources;
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7. associate the elastic IP to the instance created above.
8. reboot the instance

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but when I try to connect Uwsgi and my django app, there is a problem