Resolved: Underscore variable with walrus operator in Python

Question:

In Python, the variable name _ (underscore) is often used for throwaway variables (variables that will never be used, hence do not need a proper name).
With the walrus operator, :=, I see the need for a variable that is rather short lived (used in say only one line of code). I wonder if the use of _ is reasonable to use also in this case, or if it might be confusing for someone reading the code?
Example:
Here a pandas series is created and immediately filtered. The name dummy could in my opinion be replaced with _:

Answer:

You are using the variable dummy, to filter the series. Therefore, don’t replace it with _.

If you have better answer, please add a comment about this, thank you!