If we considered this input in Python:

s="""David Smith 17,15,14,19 Melina Jackson 15,16,17,19,20 Charli Decker 14,15,18 """

I want to have this output:

{"David_Smith":16.25," Melina_Jackson":21.75,"Charli Decker":15.75}

CodePudding user response：

What you can do is :

1. split the string every space. It will create a list with 3 elements per person : first name, last name and marks (I guess),
2. iterate over the list. First we concatenate the first name and last name into Mark_Twain. Then we calculate the mean. Then we add this pair into a dictionnary

def calc_mean(numbers: list[int]) -> float:
    """calculate a mean"""
    return sum(numbers) / len(numbers)


def extract_mean_from_string(s: str) -> dict:

    arr = s.strip().split(" ")

    means = {}

    i = 0
    while i < len(arr):
        name = arr[i]   "_"   arr[i   1]
        string_numbers = arr[i   2]
        numbers = list(map(int, string_numbers.strip().split(",")))
        means[name] = calc_mean(numbers)

        i  = 3
    return means


# If we considered this input in Python:
s = """David Smith 17,15,14,19 Melina Jackson 15,16,17,19,20 Charli Decker 14,15,18 """

# I want to have this output:
expected = {"David_Smith": 16.25, " Melina_Jackson": 21.75, "Charli Decker": 15.75}

print(expected)
print(extract_mean_from_string(s))

{'David_Smith': 16.25, ' Melina_Jackson': 21.75, 'Charli Decker': 15.75}
{'David_Smith': 16.25, 'Melina_Jackson': 17.4, 'Charli_Decker': 15.666666666666666}

Those are the correct values.

CodePudding user response：

I am providing this answer that you want to get the average of those numbers.

Average of 17,15,14,19 equal to 16.25

There can be shorter ways, my code looks like this :

string ="""David Smith 17,15,14,19 Melina Jackson 15,16,17,19,20 Charli Decker 14,15,18"""

mydict = {}
total = 0
numbers,fname,fullname = [],[],[]

data = string.split(' ')

for i in data :

    c = data.index(i)
    c  = 1

    if c%3 == 0 :
        numbers.append(i)
    elif i.isalpha() :
        fname.append(i)

for item1, item2 in zip(fname[::2], fname[1::2]):
    fullname.append(str(item1) ' ' str(item2))

for z in range(len(numbers)) :
    allno = numbers[z].split(',')
    for no in allno :
        total  = int(no)
        
    avg = "{:.2f}".format((total/len(allno)))

    mydict[fullname[z]] = avg
    total = 0

print(mydict)

Output : {'David Smith': '16.25', 'Melina Jackson': '17.40', 'Charli Decker': '15.67'}