Return values of a dictionary as percentages (in Python)

I have a dictionary which lists the number of occurrences of something, but I want to turn those occurrences into percentages.

Suppose the dictionary is like this:

s_dict={'s1':3,
       's2':5,
       's3':2}

My initial approach was something like this:

def rates_of_values(dictionary):
    d={}
    for k, v in dictionary:
      d[k] = (dictionary[v] * 1.0 / sum(dictionary.values()))*100

But that didn't work, so I simplified:

for k, v in heads:
     heads[k] = ((v/(sum(heads.values())))*100)

When I try those above, I get an error 'too many values to unpack (expected 2)'.
I was able to iterate through the dictionary and return the values as percentages successfully with this:

for value in heads.values():
     print(((value/(sum(heads.values())))*100))

But I want to assign it to a new dictionary with the same original keys ('s1','s2'...)

Thank you in advance!!!

Here is the answer you are looking for. Hope it helps!

# Given a dictionary representing the number of occurrences of certain items,
# this function calculates and returns the percentages for each item.

def calculate_percentages(dictionary):
    total_occurrences = sum(dictionary.values())
    percentages = {}

    for item, occurrences in dictionary.items():
        percentage = (occurrences / total_occurrences) * 100
        percentages[item] = percentage

    return percentages

# Example usage:
s_dict = {'s1': 3, 's2': 5, 's3': 2}
result_dict = calculate_percentages(s_dict)
print(result_dict)

Explanation:

1. The calculate_percentages() function takes a dictionary as input representing the number of occurrences of certain items.
2. The variable total_occurrences is used to store the sum of all the values in the dictionary.
3. A new dictionary called percentages is created to store the calculated percentages for each item.
4. The function iterates over the key-value pairs of the input dictionary using .items(), with item representing the key and occurrences representing the value.
5. For each item, the corresponding percentage is calculated by dividing its occurrences by the total occurrences and then multiplying by 100.
6. The calculated percentage is assigned to the percentages dictionary with the item as the key.
7. Finally, the percentages dictionary is returned by the function.
8. In the example usage, the s_dict dictionary is passed to the calculate_percentages() function, and the resulting percentages are stored in the result_dict dictionary, which is then printed.

This code should correctly calculate the percentages of occurrences for each item in the dictionary.