How Python empties a list

1. Large data Volume list, to do local element deletion, as far as possible to avoid using Del random deletion, very affect performance, if the deletion is very large, rather than directly create a list, and then use the following method to release the old list.

2. For a list with a large general data volume, fast emptying frees up memory and can be released directly with a = []. Where A is list.

3. For a list as a function parameter, it is not possible to use the above method, because after the function is executed, the list length is constant, but you can release a parameter in the function List of memory: Del a[:], fast, also thorough:)

How Python empties a list