How to preserve quote style when mutating field?

[mtkennerly]

This is the same as #112 , but I reproduced the issue using the current release (0.12.3). Not sure if it's a bug or if there's an option I don't know about.

Given this code:

import tomlkit
from pathlib import Path

path = Path("data.toml")

path.write_text("""
[foo]
bar = 'baz'
""")

data = tomlkit.parse(path.read_text(encoding="utf-8"))
data["foo"]["bar"] = "quux"
path.write_bytes(tomlkit.dumps(data).encode("utf-8"))

print(path.read_text(encoding="utf-8"))

Output:

[foo]
bar = "quux"

Is it possible to preserve the single quotes when mutating the field?

[jonyscathe]

Only way I can see to do this is to check the _t of the existing string.

Straight after parsing, data["foo"]["bar"] is not a str, it is a tomlkit.items.String.

So you could do something like:

data["foo"]["bar"] = tomlkit.string("quux", literal=data["foo"]["bar"]._t.is_literal())

And that will preserve whether it is a literal or not.

Obviously that is not a very nice way to modify a string, but tomlkit doesn't seem to provide any other way to do this as far as I can tell.