Add support for Template type (t-strings) to pprint #134551
Comments
|
Good idea, cc @davepeck @lysnikolaou
>>> attributes = {"id": "main"}
>>> attribute_value = "shrubbery"
>>> content = "hello"
>>> template = t"<span {attributes} data-value={attribute_value}>{content}</span>"
>>> pp(template)
Template(strings=('<span ', ' data-value=', '>', '</span>'),
interpolations=(Interpolation({'id': 'main'}, 'attributes', None, ''),
Interpolation('shrubbery',
'attribute_value',
None,
''),
Interpolation('hello', 'content', None, '')))
>>>
>>> nested = t"<div>{template}</div>"
>>> pp(nested)
Template(strings=('<div>', '</div>'),
interpolations=(Interpolation(Template(strings=('<span ',
' data-value=',
'>',
'</span>'),
interpolations=(Interpolation({'id': 'main'},
'attributes',
None,
''),
Interpolation('shrubbery',
'attribute_value',
None,
''),
Interpolation('hello',
'content',
None,
''))),
'template',
None,
''),))Or something like Black formatting takes up less vertical and horizontal space: Template(
strings=("<div>", "</div>"),
interpolations=(
Interpolation(
Template(
strings=("<span ", " data-value=", ">", "</span>"),
interpolations=(
Interpolation({"id": "main"}, "attributes", None, ""),
Interpolation("shrubbery", "attribute_value", None, ""),
Interpolation("hello", "content", None, ""),
),
),
"template",
None,
"",
),
),
)And taking the simpler case: >>> from pprint import pp
>>> name = "World"
>>> pp(t"Hello {World}")
Template(strings=('Hello ', ''),
interpolations=(Interpolation('World', 'name', None, ''),))""")Formats like: Template(
strings=("Hello ", ""), interpolations=(Interpolation("World", "name", None, ""))
)Or with Template(
strings=("Hello ", ""),
interpolations=(Interpolation("World", "name", None, ""),),
)Obviously we don't need to implement the full flexibility and complexity of Black-style formatting, but perhaps something along these lines? |
I didn't dare to get away from |
|
I agree with @hugovk that Black-like formatting makes this more readable. If people are okay with that, I'd certainly prefer it. |
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Feature or enhancement
Proposal:
Update
pprintfunctions to understand and formatTemplateandInterpolationtypes:I believe it will be quite common to play with t-strings in the REPL and other dynamic environments, where pretty formatting could help a lot. I don't know how high is the bar for adding types to the
pprintregistry, though.If this is deemed worthwhile, I have a working implementation, pretty straightforward.
More complex examples (inspired from the PEP), to give a sense of what it could look like:
Unfortunately, "interpolation" being a quite long word repeated 2 times in the repr of a t-string, with default formatting rules we soon have text crumpled to the right of the screen... but I believe it is still more readable than
Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response
Linked PRs
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