def from_sympy(self, a):
"""Convert SymPy's Rational to `dtype`. """
if a.is_Rational:
return PythonRational(a.p, a.q)
elif a.is_Float:
from sympy.polys.domains import RR
return PythonRational(*RR.as_integer_ratio(a))
else:
raise CoercionFailed("expected `Rational` object, got %s" % a)
def from_RealField(K1, a, K0):
"""Convert a mpmath `mpf` object to `dtype`. """
p, q = K0.to_rational(a)
return PythonRational(int(p), int(q))
def from_QQ_gmpy(K1, a, K0):
"""Convert a GMPY `mpq` object to `dtype`. """
return PythonRational(PythonInteger(a.numer()),
PythonInteger(a.denom()))
def from_ZZ_gmpy(K1, a, K0):
"""Convert a GMPY `mpz` object to `dtype`. """
return PythonRational(PythonInteger(a))
def from_ZZ_python(K1, a, K0):
"""Convert a Python `int` object to `dtype`. """
return PythonRational(a)
def from_RR_mpmath(K1, a, K0):
"""Convert a mpmath `mpf` object to `dtype`. """
return PythonRational(*K0.as_integer_ratio(a))
