def weight_space(self, base_ring=QQ):
"""
Returns the weight space associated to self.
EXAMPLES::
sage: RootSystem(['A',3]).weight_space()
Weight space over the Rational Field of the Root system of type ['A', 3]
"""
return WeightSpace(self, base_ring)
def weight_space(self, base_ring=QQ, extended = False):
"""
Returns the weight space associated to self.
.. see also::
- :meth:`weight_lattice`
- :meth:`coweight_space`, :meth:`coweight_lattice`
- :class:`~sage.combinat.root_system.WeightSpace`
EXAMPLES::
sage: RootSystem(['A',3]).weight_space()
Weight space over the Rational Field of the Root system of type ['A', 3]
sage: RootSystem(['A',3,1]).weight_space(extended = True)
Extended weight space over the Rational Field of the Root system of type ['A', 3, 1]
"""
return WeightSpace(self, base_ring, extended = extended)