I have a sorted list, for example `x = [120, 99, 90, 90, 40, 5, 5, 5, 1, 1]`.
I want to find the index of the last element that is greater than a variable, for example `limit = 30`. In this example, I want to get 4, because that's the index of 40 (and 5 is lower than 30).
How can I do that efficiently in python?
I can do looping like this:

```
def filtering(x, limit):
    for i,elem in enumerate(x):
       if elem <=limit:
          return i-1
    return i

```

But I was thinking if there is any better way / numpy function to do this. Thanks!