w

liste = []
begin = 0
moyenne= 0
for i in range(len(daytime['Sleep'])):
    if daytime["hours"][i]>9 and daytime["hours"][i]<10 and daytime["Sleep"] [i] != 0:
        begin += daytime["Sleep"][i]
        moyenne=begin/len(liste)
    if daytime["Sleep"] [i] == 0: #ignores zero values (eg twitch)
        continue
    liste.append(begin)

print(begin/len(liste))