Using the .coeff to get the coefficient of an expression using sympy parser

[Abdul-Azeez Isiaq]

I am quite new to python and am using the sympy library to work on some mathematical code using the parser input. The problem is that it parses the coefficient of x as the constant when there is no constant in the expression. Below is a simple example of what am trying to explain.

>>> parse_expr("2x", transformations=transformations)

2x

>>> eqn= parse_expr("2x", transformations=transformations)

>>> eqn.coeff('x',0)

2

>>> eqn.coeff('x')

2

]

 At least am very sure eqn.coeff('x',0) which is a constant is eqn  to 0  in this equation but the compiler says it is 2.

[Aaron Meurer]

Yeah, that looks like a wrong result to me. It's because it's using
as_independent(x), but it should only do that if it's an Add. I think
it should be an easy fix if you want to give it a shot.

Aaron Meurer

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