fixed output path

    ax.set_ylabel(r'$I(QD)$',fontsize=20)

    ax.tick_params(direction='in', axis='both', which='both', labelsize=18, pad=10)

    ax.legend(fontsize=16,frameon=False)

    plt.savefig('/src/output.png')

    plt.savefig('output.png')

    # plt.show()

    # print the result

    print('Printing results to output.txt')

    with open('/src/output.txt', 'a') as f:

    with open('output.txt', 'a') as f:

        for param in result.params.values():

            if param.stderr is None: 

                string = "%s:  %f +/- undetermined (init = %f)" % (param.name, param.value, param.init_value)