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|
: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 1.0.0 (Tom's Obvious Minimal
Language, `https://toml.io <https://toml.io/en/>`_). This module does not
support writing TOML.
.. seealso::
The :pypi:`Tomli-W package <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 :pypi:`TOML Kit package <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(msg, doc, pos)
Subclass of :exc:`ValueError` with the following additional attributes:
.. attribute:: msg
The unformatted error message.
.. attribute:: doc
The TOML document being parsed.
.. attribute:: pos
The index of *doc* where parsing failed.
.. attribute:: lineno
The line corresponding to *pos*.
.. attribute:: colno
The column corresponding to *pos*.
.. versionchanged:: 3.14
Added the *msg*, *doc* and *pos* parameters.
Added the :attr:`msg`, :attr:`doc`, :attr:`pos`, :attr:`lineno` and :attr:`colno` attributes.
.. deprecated:: 3.14
Passing free-form positional arguments is deprecated.
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 |
+==================+======================================================================================+
| TOML document | 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 |
+------------------+--------------------------------------------------------------------------------------+
| table | dict |
+------------------+--------------------------------------------------------------------------------------+
| inline table | dict |
+------------------+--------------------------------------------------------------------------------------+
| array of tables | list of dicts |
+------------------+--------------------------------------------------------------------------------------+
|
