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fastdatetime-0.3.2
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Like datetime, but fast
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | fastdatetime-0.3.2 |
| نام | fastdatetime |
| نسخه کتابخانه | 0.3.2 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | - |
| ایمیل نویسنده | - |
| آدرس صفحه اصلی | - |
| آدرس اینترنتی | https://pypi.org/project/fastdatetime/ |
| مجوز | MIT OR Apache-2.0 |
<div align="center">
# fastdatetime
Like `datetime`, but fast 🚀
[Implementation](#implementation) •
[Installation](#installation) •
[FAQ](#faq) •
[Acknowledgements](#acknowledgements)
[](COPYRIGHT.md)
</div>
## Implementation
### `strptime`
In the pursuit of a faster `strptime` implementation, two backing [Rust crates](https://doc.rust-lang.org/book/ch07-01-packages-and-crates.html) were chosen due to their popularity in the ecosystem – [`chrono`](https://github.com/chronotope/chrono) and [`time`](https://github.com/time-rs/time).
Both impementations are exposed under the following methods:
1. `fastdatetime.strptime` (based on [time](https://github.com/time-rs/time) along with [time-fmt](https://github.com/misawa/time-fmt))
2. `fastdatetime.chrono.strptime` (based on [chrono](https://github.com/chronotope/chrono))
Initially, `chrono` seemed liked a drop-in replacement, however due to subtle differences of `%f` specifier the format argument needs to preprocessed to conform to the [Python referece](https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes) which incurs slight performance overhead as the format string needs to be scanned.
Furthermore, even without this shortcoming, the parsing was slower compared to `time`.
What's also interesting is that `time` doesn't support `strptime` compatible inferface out of the box – fortunatelly [time-fmt](https://github.com/misawa/time-fmt) does (in addition, some fixes and new functionality was upstreamed to the crate).
### `parse`
Oftentimes the date format is not known ahead of time, or it is not possible to infer it from a few samples. In Python, one would usually opt for using the `dateutil` package, which can deal with all sorts of edge cases and is very forgiving, however these guarantees come at a cost – in order for the results to not be ambiguous but accurate, the user can tweak a lot of options (is the day or year first, ...) and has to sacrifice performance.
Enter [`dtparse` by Bradlee Speice](https://speice.io/2018/06/dateutil-parser-to-rust.html), a rewrite of `dateutil.parse` in Rust. Going full circle, `fastdatetime` just exposes Python bindings to Bradlee's excellent [crate](https://crates.io/crates/dtparse). This yields ~15x faster parsing performance (657 vs 42 Kops/sec on M1 Pro).
## Installation
TBD
## FAQ
TBD
## Acknowledgements
* [time](https://github.com/time-rs/time) and [time-fmt](https://github.com/misawa/time-fmt) for the default `strptime` implementation
* [chrono](https://github.com/chronotope/chrono) as an alternative implementation parse `strptime` formats ([specifiers reference](https://docs.rs/chrono/latest/chrono/format/strftime/index.html))
* [dtparse](https://github.com/bspeice/dtparse) ([dateutil](https://github.com/dateutil/dateutil) implemented in Rust)
* [pyo3](https://github.com/PyO3/pyo3) for Python bindings
* [maturin](https://github.com/PyO3/maturin) for building Python wheels
## License
© 2022 Contributors of Project fastdatetime.
This project is licensed under either of
- [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0) ([`LICENSE-APACHE`](LICENSE-APACHE))
- [MIT license](https://opensource.org/licenses/MIT) ([`LICENSE-MIT`](LICENSE-MIT))
at your option.
The [SPDX](https://spdx.dev) license identifier for this project is `MIT OR Apache-2.0`.
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.7 | Python |
نحوه نصب
نصب پکیج whl fastdatetime-0.3.2:
pip install fastdatetime-0.3.2.whl
نصب پکیج tar.gz fastdatetime-0.3.2:
pip install fastdatetime-0.3.2.tar.gz