元组列表到元组列表[重复]

Question

这个问题已经在这里有了答案：

• 如何在python中按相似的索引/属性对元组/对象列表进行分组？ 3个答案

假设我有一个元组列表，当前按第一个元素排序：

tuple_list = [(1, "hello", "apple"), (1, "no", "orange"),
    (2, "bye", "grape"), (3, "okay", "banana"),
    (4, "how are you?", "raisin"), (4, "I'm doing well", "watermelon")]

我想根据每个元组的第一个元素将此元组列表转换为元组列表列表。

例如：

new_tuple_list = [[(1, "hello", "apple"), (1, "no", "orange")],
    [(2, "bye", "grape")], [(3, "okay", "banana")],
    [(4, "how are you?", "raisin"), (4, "I'm doing well", "watermelon")]]

Answer 1

使用itertools.groupby可基于整数对项目进行分组：

from itertools import groupby

lst = [list(g)for _, g in groupby(tuple_list, lambda x: x[0])]
print(lst)

---

[[(1, 'hello', 'apple'), (1, 'no', 'orange')], 
 [(2, 'bye', 'grape')], 
 [(3, 'okay', 'banana')], 
 [(4, 'how are you?raisin'), (4, "I'm doing well", 'watermelon')]]

Answer 2

您可以为此使用itertools.groupby ：

[list(x) for k, x in itertools.groupby(tuple_list, operator.itemgetter(0))]