根据 python 中的另一个列表查找最大值的索引

Question

有人可以帮我处理这部分代码吗？我不知道应该如何编写以下代码的注释部分。

p = [3, 1, 2, 4, 5]
ed = [(1,3), (1,4), (2,5), (3,2)]

for (i,j) in ed:
    if i=1:

# the j for i= 1 would be 3 and 4 since I have (1,3) and (1,4) in "ed".
# I want to chose maximum between j, so in this case the maximum is 4.
# then considering list "p" I want to know the index of the j (here is 4) in the list "p"
#so the expected outcome must be 3 since the index of 4 in the list p is 3.

Answer 1

这里是你如何做到的：

p = [3, 1, 2, 4, 5]
ed = [(1,3), (1,4), (2,5), (3,2)]

i = 1

print(p.index(max([num[1] for num in ed if num[0] == i])))

输出：

>>>
3

请注意，如果在 ed 中找不到元组或在 p 中找不到数字，这将导致错误。所以你可能想处理这些情况

根据 python 中的另一个列表查找最大值的索引

Finding the index of max value based on another list in python

python

max