Using the name of the built-in function as a variable can cause unexpected problems.

```
# example

type = 'Hello'

...

type('Happy')

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'str' object is not callable

```

You can go back without any problems right now, but you may have problems later when others make corrections.

This code can be returned without any problems right now, but it may cause problems later when others make a change.

In the Lib/xml/etree function/_default, assign a value for the type.

```
...

type = self._doctype[1]
if type == "PUBLIC" and n == 4:
    name, type, pubis, system = self._doctype

...
```

We usually do not accept pure cosmetic changes.