我需要编写一个merge_sort
和一个相应的merge_two_halves
函数来对元组的参数列表进行排序。列表应按相反顺序排序(最大 - 最小)。元组列表中作为参数传递给merge_sort
函数的每个元组都包含两个元素,merge_sort
函数应该使用每个元组的第一个元素(一个字符串)作为排序键。 / p>
这样:
def main():
print("1.")
a_list = [0, 0, 0, 0, 0]
list_of_tuples_left = [('Tim', 194493), ('Song', 201670), ('Abe', 203126)]
list_of_tuples_right = [('Jim', 194169), ('Ben', 179619)]
merge_two_halves(a_list, list_of_tuples_left, list_of_tuples_right)
print(a_list)
print()
print("2.")
a_list = [0, 0, 0, 0, 0, 0, 0, 0]
list_of_tuples_left = [('Joseph', 194493), ('Ethan', 201670), ('Christopher',
203126),('Andrew', 202301)]
list_of_tuples_right = [('William', 194169), ('David', 179619), ('Anthony',
191681), ('Alexander', 178646)]
merge_two_halves(a_list, list_of_tuples_left, list_of_tuples_right)
print(a_list)
print()
print("3.")
names_id_tuples = get_list_of_tuples_from_file("namesId.txt")
merge_sort(names_id_tuples)
for i in range(30):
print(names_id_tuples[i])
print()
我甚至不知道从哪里开始。任何帮助都很棒
答案 0 :(得分:0)
在幻灯片上查找合并排序,只需复制并粘贴它,它应该用于merge和merge_two_halves。一旦你粘贴在def合并下面(?):和def merge_two_halves(?): 那么你唯一需要改变的是一个<到>在merge_two_halves中,您可以尝试找出哪一个。