محاسبه معدل از نمرات دانش‌آموز در دیکشنری

scores = {"math": 18, "physics": 17, "chemistry": 19}
average = sum(scores.values()) / len(scores)
print(average)

scores={'riazi':'20'  ,'fizik':'18', 'farsi':'15'}
s=0
for i in  scores:
    s+=int(scores[i])
print(s/len(scores))

def average(dict_data):
    # calculate average of any dict
    # TIP :
    # you can write easier code but I just wrote like this to
    # send a answer :)
    value = 0
    result_value = 0
    data_list = [value+dict_data[base] for base in dict_data]
    for av_value in data_list:
        result_value += av_value
    return result_value / len(data_list)

# sample
data = {
    "math": 18,
    "physics": 19,
    "paint": 17,
    "history": 15,
}

# result
point = average(data)
print(point)