def convert_postfix_list()

in src/latex2sympy2_extended/latex2sympy2.py [0:0]

• 26 lines of code
• 20 McCabe index (conditional complexity)

    def convert_postfix_list(self, arr, i=0):
        if i >= len(arr):
            raise Exception("Index out of bounds")

        res = self.convert_postfix(arr[i])

        if isinstance(res, sympy.Expr) or isinstance(res, sympy.Matrix):
            if i == len(arr) - 1:
                return res  # nothing to multiply by
            else:
                # multiply by next
                rh = self.convert_postfix_list(arr, i + 1)

                if (hasattr(res, 'is_Matrix') and res.is_Matrix) or (hasattr(rh, 'is_Matrix') and rh.is_Matrix):
                    return self.mat_mul_flat(res, rh)
                # Support for mixed fractions, 2 \frac{1}{2}
                elif hasattr(res, 'is_Integer') and res.is_Integer and hasattr(rh, 'is_Rational') and rh.is_Rational and rh.p > 0 and rh.q > 0:
                    if res < 0:
                        return sympy.Rational(res*rh.q - rh.p, rh.q)
                    else:
                        return sympy.Rational(res*rh.q + rh.p, rh.q)
                else:
                    return self.mul_flat(res, rh)
        elif isinstance(res, list) and len(res) == 1:  # must be derivative
            wrt = res[0]
            if i == len(arr) - 1:
                raise Exception("Expected expression for derivative")
            else:
                expr = self.convert_postfix_list(arr, i + 1)
                return sympy.Derivative(expr, wrt)
        
        return res