Better `repr` for `string.templatelib.Template`.

Feature or enhancement

Proposal:

Currently the repr output for template strings shows how the data is stored internally, but this is not how the template could be reconstructed via an constructor call and the format is unintuitive since the template parts are not output in the order they appear in the template source. The repr result should output the parts in the order as iterating over the template object does, i.e.

x = 1
y = 2
print(repr(t'{x} + {y}'))

should print

Template(Interpolation(1, 'x', None, ''), ' + ', Interpolation(2, 'y', None, ''))

instead of

Template(strings=('', ' + ', ''), interpolations=(Interpolation(1, 'x', None, ''), Interpolation(2, 'y', None, '')))

This has already been discussed at https://discuss.python.org/t/repr-output-of-t-strings/107653

I'm working on a patch/pull request.

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/repr-output-of-t-strings/107653

Linked PRs

• gh-151104

issue で説明されている string.templatelib.Template の repr の動作から始め、template オブジェクトの反復処理と比較してください。repr が反復順序で Template の各部分を出力し、提案されているコンストラクター呼び出し形式と一致することを確認してください。gh-151104 が関連付けられているため、開始する前にその作業を確認してください。