New submission from Sascha Desch <[email protected]>:
It appears when adding auto-numbered positional fields in python 3.1
`Formatter.parse` was not updated to handle them and currently returns an empty
string as the field name.
```
list(Formatter().parse('hello {}')) # [('hello ', '', '', None)]
```
This does not align with `Formatter.get_field` which according to the docs:
"Given field_name as returned by parse() (see above), convert it to an object
to be formatted."
When supplying an empty string to `.get_field()` you get a KeyError
```
Formatter().get_field("", [1, 2, 3], {}). # raises KeyError
```
----------
messages: 405610
nosy: SDesch
priority: normal
severity: normal
status: open
title: string.Formatter.parse does not handle auto-numbered positional fields
type: behavior
versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python
3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue45704>
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