Question

说，我有一个如下列表：

if(i < smallIndex)

我想删除重复的连续元组。所以在上面的例子中，它应该返回：

 $sql=mysql_query("SELECT * FROM subjects");

Answer 1

您可以使用itertools.groupby：

from itertools import groupby

x = [(2, 1), (1, 0), (1, 0), (1, 0), (2, 1), (2, 1)]
x_grouped = [i for i, j in groupby(x)]
# [(2, 1), (1, 0), (2, 1)]

Answer 2

您可以使用仅生成与前一个元素不相等的元素的生成器：

def filter_consecutive_duplicates(it):
    prev = object()  # sentinel object, won't be equal to anything else
    for elem in it:
        if elem != prev:
            yield elem
        prev = elem

演示：

>>> list(filter_consecutive_duplicates([(2, 1), (1, 0), (1, 0),(1,0),(2,1), (2, 1)]))
[(2, 1), (1, 0), (2, 1)]

Answer 3

a=[(2, 1), (1, 0), (1, 0), (1,0), (2,1), (2, 1)]
a=[elem for count,elem in enumerate(a) if elem!=a[count-1] or count==0]

这个列表理解怎么样

从列表中删除重复的连续元组？

3 个答案: