| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 |
- """Implementation of :class:`CompositeDomain` class. """
- from sympy.polys.domains.domain import Domain
- from sympy.polys.polyerrors import GeneratorsError
- from sympy.utilities import public
- @public
- class CompositeDomain(Domain):
- """Base class for composite domains, e.g. ZZ[x], ZZ(X). """
- is_Composite = True
- gens, ngens, symbols, domain = [None]*4
- def inject(self, *symbols):
- """Inject generators into this domain. """
- if not (set(self.symbols) & set(symbols)):
- return self.__class__(self.domain, self.symbols + symbols, self.order)
- else:
- raise GeneratorsError("common generators in %s and %s" % (self.symbols, symbols))
- def drop(self, *symbols):
- """Drop generators from this domain. """
- symset = set(symbols)
- newsyms = tuple(s for s in self.symbols if s not in symset)
- domain = self.domain.drop(*symbols)
- if not newsyms:
- return domain
- else:
- return self.__class__(domain, newsyms, self.order)
- def set_domain(self, domain):
- """Set the ground domain of this domain. """
- return self.__class__(domain, self.symbols, self.order)
- @property
- def is_Exact(self):
- """Returns ``True`` if this domain is exact. """
- return self.domain.is_Exact
- def get_exact(self):
- """Returns an exact version of this domain. """
- return self.set_domain(self.domain.get_exact())
- @property
- def has_CharacteristicZero(self):
- return self.domain.has_CharacteristicZero
- def characteristic(self):
- return self.domain.characteristic()
|
