68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
"""Configuration utilities for polynomial manipulation algorithms. """
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from contextlib import contextmanager
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_default_config = {
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'USE_COLLINS_RESULTANT': False,
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'USE_SIMPLIFY_GCD': True,
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'USE_HEU_GCD': True,
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'USE_IRREDUCIBLE_IN_FACTOR': False,
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'USE_CYCLOTOMIC_FACTOR': True,
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'EEZ_RESTART_IF_NEEDED': True,
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'EEZ_NUMBER_OF_CONFIGS': 3,
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'EEZ_NUMBER_OF_TRIES': 5,
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'EEZ_MODULUS_STEP': 2,
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'GF_IRRED_METHOD': 'rabin',
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'GF_FACTOR_METHOD': 'zassenhaus',
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'GROEBNER': 'buchberger',
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}
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_current_config = {}
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@contextmanager
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def using(**kwargs):
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for k, v in kwargs.items():
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setup(k, v)
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yield
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for k in kwargs.keys():
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setup(k)
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def setup(key, value=None):
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"""Assign a value to (or reset) a configuration item. """
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key = key.upper()
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if value is not None:
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_current_config[key] = value
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else:
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_current_config[key] = _default_config[key]
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def query(key):
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"""Ask for a value of the given configuration item. """
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return _current_config.get(key.upper(), None)
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def configure():
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"""Initialized configuration of polys module. """
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from os import getenv
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for key, default in _default_config.items():
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value = getenv('SYMPY_' + key)
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if value is not None:
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try:
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_current_config[key] = eval(value)
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except NameError:
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_current_config[key] = value
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else:
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_current_config[key] = default
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configure()
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