I have seen the answer. However, I wanted to try to do it differently to improve my understanding. This concerns slide 12 of guided project 1 (basic python).
The purpose is to present average of each genres. Can someone please help to explain what I am doing wrong:
def avg_rating(dataset, index):
tables = {}
len_genre = 0
for row in dataset:
key = row[index]
if key in tables: # e.g if Social Networking is the prime_genre
tables[key] += float(row[5]) # will add rating_count_total to table
len_genre += 1
else:
tables[key] = float(row[5])
len_genre = 1
#pretty much similar to slide 11 when the same code produces genres as % of the total apps. However, this code does not work to show average for all genres. Can someone please help me to understand what I am doing wrong. Thanks.
avg_n_ratings = {}
if key in tables:
average = tables[key] / total
avg_n_ratings[key] = average
return avg_n_ratings
avg_rating(ios, -5)
Output:
{‘Food & Drink’: 239.14297385620915}