Comment #27 on issue 2307 by [email protected]: as_coeff_mul()[0] !=
as_coeff_Mul()[0] when the coeff is Number (not Rational)
http://code.google.com/p/sympy/issues/detail?id=2307
If you really want to combine these, I guess I would recommend making
as_coeff_Mul take a Real or Rational hint and perhaps and `args` hint so
>>> (3.*x*y).as_coeff_Mul(Real) would return (3.0, x*y)
>>> (3.*x*y).as_coeff_Mul(Rational) would return (1, 3.0*x*y)
>>> (3.*x*y).as_coeff_Mul(Rational, args=True) would return (1, (3.0,
x, y))
So as not to depend on importing Real and Rational, perhaps 1 or 1.0 could
be passed for the coeff_hint instead. I don't think the deps option for
as_coeff_foo is being used anywhere but would have to double check that.
(So losing that capability might not cause any problems; if that was
removed then as_independent with the as_Add keyword followed by
return_value[1] a list would duplicate the as_coeff_mul behavior.)
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