my_list = ["this", "week", "is", "going", "great"]

print("列表是 :")

print(my_list)

my_result = ""
max_length = 0
for element in my_list:

   vowel_length = len([element for element in element if element in ['a', 'e', 'o', 'u', 'i']])
   if vowel_length > max_length:
      max_length = vowel_length
      my_result = element

print("结果是 :")
print(my_result)

列表是 :
['this', 'week', 'is', 'going', 'great']
结果是 :
going