def convert_postfix_list()

in evaluation/latex2sympy/latex2sympy2.py [0:0]

• 22 lines of code
• 12 McCabe index (conditional complexity)

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

    res = convert_postfix(arr[i])

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

            if res.is_Matrix or rh.is_Matrix:
                return mat_mul_flat(res, rh)
            else:
                return mul_flat(res, rh)
    elif isinstance(res, tuple) or isinstance(res, list) or isinstance(res, dict):
        return res
    else:  # must be derivative
        wrt = res[0]
        if i == len(arr) - 1:
            raise Exception("Expected expression for derivative")
        else:
            expr = convert_postfix_list(arr, i + 1)
            return sympy.Derivative(expr, wrt)