On Thu, Jun 27, 2019 at 9:13 AM Steven D'Aprano <steve@pearwood.info> wrote:
The only risk here is if your refactoring does something silly, such as
reusing a variable which overrides assignment:

How would you propose to write this code without reusing a variable?

def frobnicate(data):
    stuff = []
    for datum in data:
        f = process_the(data)
        g = munge_result(f)
    return stuff
Under the proposal, we have no guarantee that each iteration through the loop will give us a new `f` to work with.  Maybe yes, maybe no.  Without looking at the source code in `process_the()` we have no way of knowing whether `f` is being bound to a new object each time or some completely different arbitrary action. 

Keeping medicines from the bloodstreams of the sick; food
from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons.  Intellectual property is
to the 21st century what the slave trade was to the 16th.