如何根据Python中的某些边界提取数组中的元素？

Question

I have an array like x = [3, 5, 6, 11, 18, 24, 29] I want to extract the elements which are greater than 5 and less than or equal to 24 from x.

How can i do that?

Answer 1

x = [3, 5, 6, 11, 18, 24, 29]
selected = [i for i in x if i>5 and i<=24]
print(selected)

Answer 2

If you use/prefer numpy, you can use np.where():

x[np.where((x > 5) & (x <= 24))]

or just:

x[(x > 5) & (x <= 24)]

result:

array([ 6, 11, 18, 24])

Answer 3

If all you need to do is to extract all the elements/numbers that are greater than 5 and less than 24, you'll have to use for/while loops.

for your problem it's best to use a for loop , so the code will look something like this:

x = [3, 5, 6, 11, 18, 24, 29]
new_lst = []

for number in x:
    if number > 5 and number < 24:
        new_lst.append(number)

You can read about the .append() function here.