[英]How to flatten a list of tuples and remove the duplicates?
I'm trying to remove the duplicates out of tuples in a list and add them in a new list with out duplicates, 我正在尝试从列表中的元组中删除重复项,并将它们添加到一个没有重复项的新列表中,
I tried to make two loops but and check for duplicates or sets but the problem there's three tuples 我尝试制作两个循环,但检查重复或设置,但问题是有三个元组
can anyone help me, I'm stuck here 任何人都可以帮助我,我被困在这里
example 例
[(2, 5), (3, 5), (2, 5)]
Output 产量
[2, 3, 5]
If order isn't important, you can make a set
, add each element of each tuple to the set, and the set is your result. 如果顺序不重要,您可以创建一个set
,将每个元组的每个元素添加到集合中,集合就是您的结果。
s = set()
for tup in lst:
for el in tup:
s.add(el)
# or use a set comprehension:
# # s = {el for tup in lst for el in tup}
If order IS important, you can do mostly the same, but also have a result list to add to. 如果订单很重要,您可以大致相同,但也可以添加结果列表。
s = set()
result = []
for tup in lst:
for el in tup:
if el not in s:
s.add(el)
result.append(el)
You can use set comprehension: 你可以使用set comprehension:
lst = [(2, 5), (3, 5), (2, 5)]
{e for l in lst for e in l}
you need to iter through each tuple and then each element of tuple. 你需要通过每个元组,然后元组的每个元素。 before append just check if the element is in list: 在追加之前,只需检查元素是否在列表中:
a = [(2, 5), (3, 5), (2, 5)]
b = []
for i in a:
for j in i:
if j not in b:
b.append(j)
print b
After running above code I got this output: 运行上面的代码后,我得到了这个输出:
[2, 5, 3]
An easy way to do so is using numpy ravel, and then set: 一个简单的方法是使用numpy ravel,然后设置:
import numpy as np
lst = [(2, 5), (3, 5), (2, 5)]
res = list(set(np.ravel(a)))
gives: 得到:
[2, 3, 5]
Answer to Apero's comment: 回答Apero的评论:
if you don't want to use numpy, you would be able to flatten the list with: 如果您不想使用numpy,您可以使用以下内容展平列表:
lst = [(2,5), (3,5), (2,5)]
tmp = []
for i in lst:
for j in i:
tmp.append(j)
res = set(tmp)
print res
which gives: 这使:
[2, 3, 5]
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