我想通过PyQt5引入一个文本文件，并用数据值绘制一个图形。

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTextEdit, QAction, QFileDialog
from PyQt5.QtGui import QIcon
import numpy as np
import matplotlib.pyplot as plt

class MyApp(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.textEdit = QTextEdit()
        self.setCentralWidget(self.textEdit)
        self.statusBar()

        openFile = QAction(QIcon('folder.png'), 'Open', self)
        openFile.setShortcut('Ctrl+O')
        openFile.setStatusTip('Text.txt')
        openFile.triggered.connect(self.show)

        menubar = self.menuBar()
        menubar.setNativeMenuBar(False)
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(openFile)

        self.setWindowTitle('File Dialog')
        self.setGeometry(300, 300, 300, 200)
        self.show()

    def show(self):
        fname = QFileDialog.getOpenFileName(self, 'Open file', './')

        if fname[0]:
            f = open(fname[0], 'r')

            with f:
                data = f.read()
                data2=np.array(data)
                x=data2[1:,0]
                y=data2[1:,1]

                plt.plot(x,y)
                plt.show()

 if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyApp()
    sys.exit(app.exec_())

文本文件照片。
这是出现的错误：

x=data2[1:,0]
IndexError: too many indices for array: array is 0-dimensional, but 2 were indexed