Status: Accepted
Owner: smichr
Labels: Type-Defect Priority-Low
New issue 2018 by smichr: terms vs factors
http://code.google.com/p/sympy/issues/detail?id=2018
When we are ready to break backward compatibility could we reverse the
names of as_coeff_terms and as_coeff_factors and excise that wart from
sympy? I expect as_coeff_factors to split apart a Mul (into coeff and
*factors*) and to do nothing to an Add and vice versa for as_coeff_terms.
But just the opposite is done
(2*x*y).as_coeff_factors() # has *factors* of 2, x and y
(0, (2*x*y,))
(2+3*x+y).as_coeff_factors() # has *terms* 2, 3x, and y
(2, (y, 3*x))
Though I doubt additional evidence is needed, I quote themathpage.com:
"When numbers are added or subtracted, they are called terms.
When numbers are multiplied, they are called factors."
Unless people have written low level stuff of their own that is not part of
sympy, the change could be made ASAP. Otherwise, this can wait until we're
ready to break backward compatibility for such work.
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