def _not_a_coeff(expr):
    return expr in [S.NaN, S.Infinity, S.NegativeInfinity, S.ComplexInfinity]
Provides a simple function for specifying a Blend data operation.
dataset/ETHPy150Open sympy/sympy/sympy/polys/polyutils.py/_not_a_coeff--crossover with--dataset/ETHPy150Open bokeh/bokeh/bokeh/charts/operations.py/blend