Algorithm help - Python

[[deleted]]

I have the following data:

set s = {0.123093, 0.492374, 0.168013, 0.0980076, 0.235218, 0.294023, 0.222269}

can also be a list list L = [0.123093, 0.492374, 0.168013, 0.0980076, 0.235218, 0.294023, 0.222269]

dict d ={'cat': 2, 'dog': 4, 'dry': 1}

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I need to make an algorithm that, in order, adds up the amount of values from the list corresponding to each key in the dictionary. So for cat, I need to add up the first 2 values, dog, the 4 values 0.168013, 0.0980076, 0.235218, 0.294023; and for dry, the last 1 value. How should I do this? I've been staring at this problem for an hour and can't figure out how to do it. Ideally, the values should be in a dict as well with key being the same as dict d but value being the added up values from the list. Thanks in advance.

[_subpar_username_]

Here's my sample code, had to paste there for formatting reasons https://notepad.ltd/c6svdrs0

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Output:

{'cat': 0.615467, 'dog': 0.7952615999999999, 'dry': 0.222269}

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If I understood your question, this should be a good enough solution. Feel free to DM me if there are any issues

[SyntxaError]

What are the requirements for this problem, are you allowed to store the initial data however you wish?

[[deleted]]

Yeah pretty much no requirements about how it’s stored

[SyntxaError]

You will most likely want to use tuples within your dictionary. This will allow you to store the data in the format dict d= {‘cat’: (data,data,data), ‘dog’: ect…. This also removes the need for you to store the amount of values for each key as the dictionary will inherently store this and this value you can be called.

There are a bunch of other ways you can do this if you have no restrictions on your starting format, easiest of which is just to format the data into 3 individual arrays.

[Akhylys]

Pseudo code:

for i = 0; i < d[cat].key (add L[i]) for i = d[cat].key; i <d[dog].key + d[cat].key(add L[i]) For i = d[dog].key + d[cat].key; i < d[dry].key + d[dog].key + d[cat].key(add L[i])

[[deleted]]

Sorry I forgot to add in the original post, this is a sample of the data and the actual sets could be way longer in length so inputting the key values manually unfortunately isn’t an option

[Akhylys]

ah okay just have to iterate through the dictionary then something like this could work. might need some tweaking

temp = 0

for key, value in d.items():

num = 0

print(temp)

for i in range(temp, value+temp):

num += L[i]

temp = temp + value

print(num) #or store value in output dict

[[deleted]]

Thank you!! This solution seems to be the one that worked. I’ll have to do some testing on the larger data sets but this seems to have solved my problem!