WTF: Oops, already in my list

 I found an interesting loop pattern, used at several places in our code. It goes like this: 

• I create an empty list
• I start a loop to fill it
• Inside my loop, I create an object and add it to my list
• Still in the loop, I need to modify the object I just added, so I retrieve it from the list

An example here:

templates = []

index = 0

json_templates = json.loads(templates_as_str)

for template_file in json_templates:

    templates.add(get_template(template_file))

    template = templates[index]

    # Do some stuff on my template

    index += 1

So yes, I could have created my template reference before storing it in the list. But it's too late! I need to use an index now...