File size: 6,840 Bytes
5a9e79d
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index ff7ffe1414..33a3ebb3a3 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -141,6 +141,8 @@ Lib/ast.py                    @isidentical
 **/*cgi*                      @ethanfurman
 **/*tarfile*                  @ethanfurman
 
+**/*tomllib*                  @encukou
+
 # macOS
 /Mac/                         @python/macos-team
 **/*osx_support*              @python/macos-team
diff --git a/Doc/library/fileformats.rst b/Doc/library/fileformats.rst
index e9c2e1fbbd..bb099fe2d3 100644
--- a/Doc/library/fileformats.rst
+++ b/Doc/library/fileformats.rst
@@ -12,6 +12,7 @@ that aren't markup languages and are not related to e-mail.
 
    csv.rst
    configparser.rst
+   tomllib.rst
    netrc.rst
    xdrlib.rst
    plistlib.rst
diff --git a/Doc/library/tomllib.rst b/Doc/library/tomllib.rst
new file mode 100644
index 0000000000..918576eb37
--- /dev/null
+++ b/Doc/library/tomllib.rst
@@ -0,0 +1,117 @@
+:mod:`tomllib` --- Parse TOML files
+===================================
+
+.. module:: tomllib
+   :synopsis: Parse TOML files.
+
+.. versionadded:: 3.11
+
+.. moduleauthor:: Taneli Hukkinen
+.. sectionauthor:: Taneli Hukkinen
+
+**Source code:** :source:`Lib/tomllib`
+
+--------------
+
+This module provides an interface for parsing TOML (Tom's Obvious Minimal
+Language, `https://toml.io <https://toml.io/en/>`_). This module does not
+support writing TOML.
+
+.. seealso::
+
+    The `Tomli-W package <https://pypi.org/project/tomli-w/>`__
+    is a TOML writer that can be used in conjunction with this module,
+    providing a write API familiar to users of the standard library
+    :mod:`marshal` and :mod:`pickle` modules.
+
+.. seealso::
+
+    The `TOML Kit package <https://pypi.org/project/tomlkit/>`__
+    is a style-preserving TOML library with both read and write capability.
+    It is a recommended replacement for this module for editing already
+    existing TOML files.
+
+
+This module defines the following functions:
+
+.. function:: load(fp, /, *, parse_float=float)
+
+   Read a TOML file. The first argument should be a readable and binary file object.
+   Return a :class:`dict`. Convert TOML types to Python using this
+   :ref:`conversion table <toml-to-py-table>`.
+
+   *parse_float* will be called with the string of every TOML
+   float to be decoded.  By default, this is equivalent to ``float(num_str)``.
+   This can be used to use another datatype or parser for TOML floats
+   (e.g. :class:`decimal.Decimal`). The callable must not return a
+   :class:`dict` or a :class:`list`, else a :exc:`ValueError` is raised.
+
+   A :exc:`TOMLDecodeError` will be raised on an invalid TOML document.
+
+
+.. function:: loads(s, /, *, parse_float=float)
+
+   Load TOML from a :class:`str` object. Return a :class:`dict`. Convert TOML
+   types to Python using this :ref:`conversion table <toml-to-py-table>`. The
+   *parse_float* argument has the same meaning as in :func:`load`.
+
+   A :exc:`TOMLDecodeError` will be raised on an invalid TOML document.
+
+
+The following exceptions are available:
+
+.. exception:: TOMLDecodeError
+
+   Subclass of :exc:`ValueError`.
+
+
+Examples
+--------
+
+Parsing a TOML file::
+
+    import tomllib
+
+    with open("pyproject.toml", "rb") as f:
+        data = tomllib.load(f)
+
+Parsing a TOML string::
+
+    import tomllib
+
+    toml_str = """
+    python-version = "3.11.0"
+    python-implementation = "CPython"
+    """
+
+    data = tomllib.loads(toml_str)
+
+
+Conversion Table
+----------------
+
+.. _toml-to-py-table:
+
++------------------+--------------------------------------------------------------------------------------+
+| TOML             | Python                                                                               |
++==================+======================================================================================+
+| table            | dict                                                                                 |
++------------------+--------------------------------------------------------------------------------------+
+| string           | str                                                                                  |
++------------------+--------------------------------------------------------------------------------------+
+| integer          | int                                                                                  |
++------------------+--------------------------------------------------------------------------------------+
+| float            | float (configurable with *parse_float*)                                              |
++------------------+--------------------------------------------------------------------------------------+
+| boolean          | bool                                                                                 |
++------------------+--------------------------------------------------------------------------------------+
+| offset date-time | datetime.datetime (``tzinfo`` attribute set to an instance of ``datetime.timezone``) |
++------------------+--------------------------------------------------------------------------------------+
+| local date-time  | datetime.datetime (``tzinfo`` attribute set to ``None``)                             |
++------------------+--------------------------------------------------------------------------------------+
+| local date       | datetime.date                                                                        |
++------------------+--------------------------------------------------------------------------------------+
+| local time       | datetime.time                                                                        |
++------------------+--------------------------------------------------------------------------------------+
+| array            | list                                                                                 |
++------------------+--------------------------------------------------------------------------------------+
diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst
index 4a64e044c4..9b82de7f4a 100644
--- a/Doc/whatsnew/3.11.rst
+++ b/Doc/whatsnew/3.11.rst
@@ -214,7 +214,8 @@ Other CPython Implementation Changes
 New Modules
 ===========
 
-* None yet.
+* A new module, :mod:`tomllib`, was added for parsing TOML.
+  (Contributed by Taneli Hukkinen in :issue:`40059`.)
 
 
 Improved Modules
diff --git a/Misc/NEWS.d/next/Library/2022-02-23-01-11-08.bpo-40059.Iwc9UH.rst b/Misc/NEWS.d/next/Library/2022-02-23-01-11-08.bpo-40059.Iwc9UH.rst
new file mode 100644
index 0000000000..d41ff1304e
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-02-23-01-11-08.bpo-40059.Iwc9UH.rst
@@ -0,0 +1 @@
+:pep:`680`, the :mod:`tomllib` module. Adds support for parsing TOML.