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https://github.com/samuelcolvin/rtoml
A fast TOML library for python implemented in rust.
https://github.com/samuelcolvin/rtoml
deserialization parser python rust toml
Last synced: 7 days ago
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A fast TOML library for python implemented in rust.
- Host: GitHub
- URL: https://github.com/samuelcolvin/rtoml
- Owner: samuelcolvin
- License: mit
- Created: 2020-01-07T22:30:25.000Z (almost 5 years ago)
- Default Branch: main
- Last Pushed: 2024-09-03T22:51:15.000Z (3 months ago)
- Last Synced: 2024-11-28T16:04:32.096Z (14 days ago)
- Topics: deserialization, parser, python, rust, toml
- Language: Python
- Homepage: https://pypi.org/project/rtoml/
- Size: 133 KB
- Stars: 324
- Watchers: 8
- Forks: 28
- Open Issues: 11
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- best-of-python - GitHub - 57% open · ⏱️ 26.01.2024): (Data Serialization)
- awesomeLibrary - rtoml - A fast TOML library for python implemented in rust. (语言资源库 / rust)
README
# rtoml
[](https://github.com/samuelcolvin/rtoml/actions?query=event%3Apush+branch%3Amain+workflow%3ACI)
[](https://codecov.io/gh/samuelcolvin/rtoml)
[](https://pypi.python.org/pypi/rtoml)
[](https://github.com/samuelcolvin/rtoml)
[](https://github.com/samuelcolvin/rtoml/blob/main/LICENSE)
A better TOML library for python implemented in rust.
## Why Use rtoml
* Correctness: rtoml is based on the widely used and very stable [toml-rs](https://github.com/alexcrichton/toml-rs)
library, it passes all the [standard TOML tests](https://github.com/BurntSushi/toml-test) as well as having 100%
coverage on python code. Other TOML libraries for python I tried all failed to parse some valid TOML.
* Performance: see [github.com/pwwang/toml-bench](https://github.com/pwwang/toml-bench) -
rtoml is the fastest Python TOML libraries at the time of writing.
* `None`-value handling: rtoml has flexible support for `None` values, instead of simply ignoring them.
## Install
Requires `python>=3.7`, binaries are available from pypi for Linux, macOS and Windows,
see [here](https://pypi.org/project/rtoml/#files).
```bash
pip install rtoml
```
If no binary is available on pypi for you system configuration; you'll need rust stable
installed before you can install rtoml.
## Usage
#### load
```python
def load(toml: Union[str, Path, TextIO], *, none_value: Optional[str] = None) -> Dict[str, Any]: ...
```
Parse TOML via a string or file and return a python dictionary.
* `toml`: a `str`, `Path` or file object from `open()`.
* `none_value`: controlling which value in `toml` is loaded as `None` in python. By default, `none_value` is `None`, which means nothing is loaded as `None`
#### loads
```python
def loads(toml: str, *, none_value: Optional[str] = None) -> Dict[str, Any]: ...
```
Parse a TOML string and return a python dictionary. (provided to match the interface of `json` and similar libraries)
* `toml`: a `str` containing TOML.
* `none_value`: controlling which value in `toml` is loaded as `None` in python. By default, `none_value` is `None`, which means nothing is loaded as `None`
#### dumps
```python
def dumps(obj: Any, *, pretty: bool = False, none_value: Optional[str] = "null") -> str: ...
```
Serialize a python object to TOML.
* `obj`: a python object to be serialized.
* `pretty`: if `True` the output has a more "pretty" format.
* `none_value`: controlling how `None` values in `obj` are serialized. `none_value=None` means `None` values are ignored.
#### dump
```python
def dump(
obj: Any, file: Union[Path, TextIO], *, pretty: bool = False, none_value: Optional[str] = "null"
) -> int: ...
```
Serialize a python object to TOML and write it to a file.
* `obj`: a python object to be serialized.
* `file`: a `Path` or file object from `open()`.
* `pretty`: if `True` the output has a more "pretty" format.
* `none_value`: controlling how `None` values in `obj` are serialized. `none_value=None` means `None` values are ignored.
### Examples
```py
from datetime import datetime, timezone, timedelta
import rtoml
obj = {
'title': 'TOML Example',
'owner': {
'dob': datetime(1979, 5, 27, 7, 32, tzinfo=timezone(timedelta(hours=-8))),
'name': 'Tom Preston-Werner',
},
'database': {
'connection_max': 5000,
'enabled': True,
'ports': [8001, 8001, 8002],
'server': '192.168.1.1',
},
}
loaded_obj = rtoml.load("""\
# This is a TOML document.
title = "TOML Example"
[owner]
name = "Tom Preston-Werner"
dob = 1979-05-27T07:32:00-08:00 # First class dates
[database]
server = "192.168.1.1"
ports = [8001, 8001, 8002]
connection_max = 5000
enabled = true
""")
assert loaded_obj == obj
assert rtoml.dumps(obj) == """\
title = "TOML Example"
[owner]
dob = 1979-05-27T07:32:00-08:00
name = "Tom Preston-Werner"
[database]
connection_max = 5000
enabled = true
server = "192.168.1.1"
ports = [8001, 8001, 8002]
"""
```
An example of `None`-value handling:
```python
obj = {
'a': None,
'b': 1,
'c': [1, 2, None, 3],
}
# Ignore None values
assert rtoml.dumps(obj, none_value=None) == """\
b = 1
c = [1, 2, 3]
"""
# Serialize None values as '@None'
assert rtoml.dumps(obj, none_value='@None') == """\
a = "@None"
b = 1
c = [1, 2, "@None", 3]
"""
# Deserialize '@None' back to None
assert rtoml.load("""\
a = "@None"
b = 1
c = [1, 2, "@None", 3]
""", none_value='@None') == obj
```