A Snowball-to-Python compiler
import sbl2py import sbl2py.utils sbl_code = """ externals ( stem ) define stem as ( backwards ( ['ly'] delete ) ) """ py_code = sbl2py.translate_string(sbl_code) module = sbl2py.utils.module_from_code('demo_module', py_code) print module.stem('fabulously')
sbl2py should support all of the Snowball features that are commonly used. In particular, all features used by the stemming algorithms from the Snowball stemmer package are supported.
Installing sbl2py is easy using pip:
pip install sbl2py
The easiest way to translate a Snowball file into a Python module is using the sbl2py script which is automatically installed with sbl2py:
sbl2py SNOWBALL_FILE PYTHON_FILE
See sbl2py --help for the available options.
You can also use sbl2py from within Python. The sbl2py module offers two functions that translate Snowball code from a string (translate_string) or a file (translate_file) and return the corresponding Python source as a string. If you want to execute the code, simply use the module_from_code function of the sbl2py.utils module.
The generated Python modules export all routines from the original Snowball code that are listed in the externals section. That is, if you have externals ( stem ) in your Snowball code and store the generated Python module in a file called mystemmer.py then you can call the stem routine as follows:
import mystemmer print mystemmer.stem('foobar')
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