Getting the real or imaginary part with SymPy.jl

[sijo]

How can I get the symbolic real or imaginary part of a Sym expression? real gives a BigFloat instead:

julia> sqrt(Sym(5))+im
√5 + ⅈ

julia> sqrt(Sym(5))+im |> real
2.236067977499789696409173668731276235440618359611525724270897245410520925637785

[j_verzani]

@sijo

sqrt(Sym(5))+im

There is sympy.re (and sympy.im) to return the a and b of a+b im. But it seems the definitions of real and imag should be changed, as they are returning numeric values, not symbolic values. (`real` and `imag` · Issue #442 · JuliaPy/SymPy.jl · GitHub)