Coverage for sympy/polys/polyconfig.py : 4%

"""Configuration utilities for polynomial manipulation algorithms. """ 

from __future__ import print_function, division 

from contextlib import contextmanager 

_default_config = { 

'USE_COLLINS_RESULTANT': False, 

'USE_SIMPLIFY_GCD': True, 

'USE_HEU_GCD': True, 

'USE_IRREDUCIBLE_IN_FACTOR': False, 

'USE_CYCLOTOMIC_FACTOR': True, 

'EEZ_RESTART_IF_NEEDED': True, 

'EEZ_NUMBER_OF_CONFIGS': 3, 

'EEZ_NUMBER_OF_TRIES': 5, 

'EEZ_MODULUS_STEP': 2, 

'GF_IRRED_METHOD': 'rabin', 

'GF_FACTOR_METHOD': 'zassenhaus', 

'GROEBNER': 'buchberger', 

} 

_current_config = {} 

@contextmanager 

def using(**kwargs): 

for k, v in kwargs.items(): 

setup(k, v) 

yield 

for k in kwargs.keys(): 

setup(k) 

def setup(key, value=None): 

"""Assign a value to (or reset) a configuration item. """ 

key = key.upper() 

if value is not None: 

_current_config[key] = value 

else: 

_current_config[key] = _default_config[key] 

def query(key): 

"""Ask for a value of the given configuration item. """ 

return _current_config.get(key.upper(), None) 

def configure(): 

"""Initialized configuration of polys module. """ 

from os import getenv 

for key, default in _default_config.items(): 

value = getenv('SYMPY_' + key) 

if value is not None: 

try: 

_current_config[key] = eval(value) 

except NameError: 

_current_config[key] = value 

else: 

_current_config[key] = default 

configure()