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Project description

regex-rust (regexrs)

Leverages the Rust regex crate with PyO3 to create an interface similar to the Python standard library re module.

pip install regex-rust
>>> import regexrs as re
>>> pattern = re.compile(r'(\w+) (\w+)')
>>> m = pattern.match('hello rust')
>>> m.groups()
('hello', 'rust')
>>> m.pos
0
>>> m.endpos
10

How to install from source

You can use pip to build and install.

pip install .

If you want to build manually:

pip install maturin
maturin build --release

Status

Mostly incomplete and likely very buggy. I am using this mostly as an exercise in creating and distributing Python extensions using Rust and PyO3. It's unclear if this will ever be a particularly useful project or not. If you're looking for a complete and performant regex library for Python today, see the regex project on PyPI.

Differences compared to standard lib:

  • The endpos argument normally found in the re module is not supported in regexrs for the match/search/findall/finditer methods.
  • Some regex features are not supported (because they are not supported by the regex crate), such as lookarounds and backreferences.
  • Not all flags are supported. At present release, you may use the flags IGNORECASE, MULTILINE, DOTALL and VERBOSE (or their shorthand equivalents). These are translated to inline flags and prepended to your given pattern.
  • Until a future release, there is no cache for avoiding re-compiling the same patterns multiple times

Project details


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