

def _union(self, other):
    if other.is_ComplexRegion:
        if ((not self.polar) and (not other.polar)):
            return ComplexRegion(Union(self.sets, other.sets))
        elif (self.polar and self.polar):
            return ComplexRegion(Union(self.sets, other.sets), polar=True)
    if (self == S.Complexes):
        return self
    return None

dataset/ETHPy150Open sympy/sympy/sympy/sets/fancysets.py ComplexRegion._union/VarMisuse@60/70 `other`->`self`