There is another use case. If you intend to modify a list within a for loop that goes over the same list, then you need to iterate over a copy. And this cannot be called an "alias" because it has no name:Unless L is aliased, this is silly code.
for idx,item in enumerate(L[:]): # do something with L here, including modification -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- https://mail.python.org/mailman/listinfo/python-list
