python - 「numpy.ndarray」オブジェクトは、この小さなコードでは呼び出すことができません

Question

import numpy as np


def main():
    try:
        date, price, open = np.loadtxt('CARG.csv', delimiter=',',
                                       unpack=True, dtype='str')

        x = 0
        for eachDate in date:
            saveLine = eachDate + ',' + price[x] + '\n'
            saveFile = open('newCSV', 'a')
            saveFile.write(saveLine)
            saveFile.close()
            x += 1

    except Exception as e:
        print(e)


main()