Is there a better way to do this in python, or rather: Is this a good way to do it?
有没有更好的方法在python中执行此操作，或者更确切地说：这是一个很好的方法吗？
x = ('a', 'b', 'c')
y = ('d', 'e', 'f')
z = ('g', 'e', 'i')
l = [x, y, z]
s = set([e for (_, e, _) in l])
I looks somewhat ugly but does what i need without writing a complex "get_unique_elements_from_tuple_list" function... ;)
我看起来有些难看，但在没有编写复杂的“get_unique_elements_from_tuple_list”函数的情况下完成了我的需要...;）
edit: expected value of s is set(['b','e'])
编辑：设置s的期望值（['b'，'e']）
1 个解决方案
#1
22
That's fine, that's what sets are for. One thing I would change is this:
那没关系，这就是套装的用途。我要改变的一件事是：
s = set(e[1] for e in l)
as it enhances readability. Note that I also turned the list comprehension into a generator expression; no need to create a temporary list.
因为它增强了可读性。请注意，我还将列表推导转换为生成器表达式;无需创建临时列表。
#1
22
That's fine, that's what sets are for. One thing I would change is this:
那没关系，这就是套装的用途。我要改变的一件事是：
s = set(e[1] for e in l)
as it enhances readability. Note that I also turned the list comprehension into a generator expression; no need to create a temporary list.
因为它增强了可读性。请注意，我还将列表推导转换为生成器表达式;无需创建临时列表。