fix: Build table with dotted key correctly

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/psf/black
-    rev: 22.12.0
+    rev: 23.3.0
     hooks:
       - id: black
 
@@ -37,7 +37,7 @@ repos:
         exclude: ^tomlkit/items\.py
 
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.3.1
+    rev: v3.3.2
     hooks:
       - id: pyupgrade
         args: [--py37-plus]

pyproject.toml

@@ -2,7 +2,10 @@
 name = "tomlkit"
 version = "0.11.7"
 description = "Style preserving TOML library"
-authors = ["Sébastien Eustace <sebastien@eustace.io>"]
+authors = [
+    "Sébastien Eustace <sebastien@eustace.io>",
+    "Frost Ming <me@frostming.com>"
+]
 license = "MIT"
 
 readme = "README.md"

tests/test_toml_document.py

@@ -1030,3 +1030,32 @@ def test_nested_table_update_display_name():
     z = 3
     """
     assert doc.as_string() == dedent(expected)
+
+
+def test_build_table_with_dotted_key():
+    doc = tomlkit.document()
+    data = {
+        "a.b.c": 1,
+        "a.b.d": 2,
+        "a": {"c": {"foo": "bar"}},
+        "a.d.e": 3,
+    }
+
+    for key, value in data.items():
+        if "." not in key:
+            doc.append(key, value)
+        else:
+            doc.append(tomlkit.key(key.split(".")), value)
+
+    expected = """\
+a.b.c = 1
+a.b.d = 2
+a.d.e = 3
+
+[a.c]
+foo = "bar"
+"""
+    assert doc.as_string() == expected
+    assert json.loads(json.dumps(doc)) == {
+        "a": {"b": {"c": 1, "d": 2}, "d": {"e": 3}, "c": {"foo": "bar"}}
+    }

tomlkit/_compat.py

@@ -1,15 +1,15 @@
+from __future__ import annotations
+
 import contextlib
 import sys
 
 from typing import Any
-from typing import List
-from typing import Optional
 
 
 PY38 = sys.version_info >= (3, 8)
 
 
-def decode(string: Any, encodings: Optional[List[str]] = None):
+def decode(string: Any, encodings: list[str] | None = None):
     if not isinstance(string, bytes):
         return string
 

tomlkit/_utils.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import re
 
 from collections.abc import Mapping
@@ -7,7 +9,6 @@
 from datetime import timedelta
 from datetime import timezone
 from typing import Collection
-from typing import Union
 
 from tomlkit._compat import decode
 
@@ -41,7 +42,7 @@
 _utc = timezone(timedelta(), "UTC")
 
 
-def parse_rfc3339(string: str) -> Union[datetime, date, time]:
+def parse_rfc3339(string: str) -> datetime | date | time:
     m = RFC_3339_DATETIME.match(string)
     if m:
         year = int(m.group(1))

tomlkit/api.py

@@ -1,11 +1,10 @@
+from __future__ import annotations
+
 import datetime as _datetime
 
 from collections.abc import Mapping
 from typing import IO
 from typing import Iterable
-from typing import Optional
-from typing import Tuple
-from typing import Union
 
 from tomlkit._utils import parse_rfc3339
 from tomlkit.container import Container
@@ -34,7 +33,7 @@
 from tomlkit.toml_document import TOMLDocument
 
 
-def loads(string: Union[str, bytes]) -> TOMLDocument:
+def loads(string: str | bytes) -> TOMLDocument:
     """
     Parses a string into a TOMLDocument.
 
@@ -59,7 +58,7 @@ def dumps(data: Mapping, sort_keys: bool = False) -> str:
         raise TypeError(msg) from ex
 
 
-def load(fp: Union[IO[str], IO[bytes]]) -> TOMLDocument:
+def load(fp: IO[str] | IO[bytes]) -> TOMLDocument:
     """
     Load toml document from a file-like object.
     """
@@ -76,7 +75,7 @@ def dump(data: Mapping, fp: IO[str], *, sort_keys: bool = False) -> None:
     fp.write(dumps(data, sort_keys=sort_keys))
 
 
-def parse(string: Union[str, bytes]) -> TOMLDocument:
+def parse(string: str | bytes) -> TOMLDocument:
     """
     Parses a string or bytes into a TOMLDocument.
     """
@@ -91,12 +90,12 @@ def document() -> TOMLDocument:
 
 
 # Items
-def integer(raw: Union[str, int]) -> Integer:
+def integer(raw: str | int) -> Integer:
     """Create an integer item from a number or string."""
     return item(int(raw))
 
 
-def float_(raw: Union[str, float]) -> Float:
+def float_(raw: str | float) -> Float:
     """Create an float item from a number or string."""
     return item(float(raw))
 
@@ -175,7 +174,7 @@ def array(raw: str = None) -> Array:
     return value(raw)
 
 
-def table(is_super_table: Optional[bool] = None) -> Table:
+def table(is_super_table: bool | None = None) -> Table:
     """Create an empty table.
 
     :param is_super_table: if true, the table is a super table
@@ -224,7 +223,7 @@ def aot() -> AoT:
     return AoT([])
 
 
-def key(k: Union[str, Iterable[str]]) -> Key:
+def key(k: str | Iterable[str]) -> Key:
     """Create a key from a string. When a list of string is given,
     it will create a dotted key.
 
@@ -261,7 +260,7 @@ def value(raw: str) -> _Item:
     return v
 
 
-def key_value(src: str) -> Tuple[Key, _Item]:
+def key_value(src: str) -> tuple[Key, _Item]:
     """Parse a key-value pair from a string.
 
     :Example: