Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 1239 by nicolas.pourcelot: decimals should be rationals (!)
http://code.google.com/p/sympy/issues/detail?id=1239
Hi,
Using, sympy 0.6.3, I noticed the following :
>>> s.Real('2.5').is_rational
>>> (sympy.Integer(5)/2).is_rational
True
>>> s.Real('2.5') == sympy.Integer(5)/2
True
I think 's.Real('2.5').is_rational' should return True, as for any Real
initialized with a float or a string (i.e. decimals).
(is_Rational attribute is enough to distinguish between fractions of
integers and floats.)
By the way, I think this should also work :
>>> sympy.factor(x**2+s.Real('2.5')*x+1)
Traceback (most recent call last):
File "<input>", line 1, in <module>
File ".../sympy/polynomials/wrapper.py", line 39, in factor
return Mul(*[ff.sympy_expr for ff in factor_.factor(f, var, order)])
File ".../sympy/polynomials/factor_.py", line 181, in factor
denom, f = f.as_integer()
File ".../sympy/polynomials/base.py", line 448, in as_integer
raise PolynomialException("%s is no rational coefficient!" % term[0])
PolynomialException: 2.50000000000000 is no rational coefficient!
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