在pyqt5中单击按钮时如何创建文件选择器

Question

图片链接

我想用pyqt5创建一个gui应用程序。我创建一个按钮（“浏览”），然后单击它打开文件浏览器以导入数据文件，但是它不起作用并且应用程序已关闭。请帮助我，我需要它。 / p>

我在Windows 10中尝试了pycharm2018，并且使用了QTDesigner

from PyQt5 import QtCore, QtGui, QtWidgets
import _pickle
class Ui_Import_data(object):
def browse_data1(self):
    data_path=QtWidgets.QFileDialog.getOpenFileName(self,'Open File',"D:\Programming",'*.txt',)
    with open('data_path.pickle', 'wb') as handle:
        _pickle.dump(data_path,handle,protocol=_pickle.HIGHEST_PROTOCOL)

def setupUi(self, Import_data):
    Import_data.setObjectName("Import_data")
    Import_data.resize(704, 131)
    self.pushButton = QtWidgets.QPushButton(Import_data)
    self.pushButton.setGeometry(QtCore.QRect(600, 20, 81, 23))
    self.pushButton.setObjectName("pushButton")
    self.label = QtWidgets.QLabel(Import_data)
    self.label.setGeometry(QtCore.QRect(10, 50, 47, 13))
    self.label.setObjectName("label")
    self.label_2 = QtWidgets.QLabel(Import_data)
    self.label_2.setGeometry(QtCore.QRect(10, 20, 121, 16))
    self.label_2.setObjectName("label_2")
    self.lineEdit = QtWidgets.QLineEdit(Import_data)
    self.lineEdit.setGeometry(QtCore.QRect(140, 20, 441, 20))
    self.lineEdit.setObjectName("lineEdit")
    self.lineEdit_2 = QtWidgets.QLineEdit(Import_data)
    self.lineEdit_2.setGeometry(QtCore.QRect(140, 50, 441, 20))
    self.lineEdit_2.setObjectName("lineEdit_2")
    self.pushButton_2 = QtWidgets.QPushButton(Import_data)
    self.pushButton_2.setGeometry(QtCore.QRect(600, 50, 81, 23))
    self.pushButton_2.setObjectName("pushButton_2")
    self.pushButton_3 = QtWidgets.QPushButton(Import_data)
    self.pushButton_3.setGeometry(QtCore.QRect(600, 100, 81, 23))
    self.pushButton_3.setObjectName("pushButton_3")
    self.pushButton_4 = QtWidgets.QPushButton(Import_data)
    self.pushButton_4.setGeometry(QtCore.QRect(510, 100, 75, 23))
    self.pushButton_4.setObjectName("pushButton_4")
    self.retranslateUi(Import_data)

    self.pushButton.clicked.connect(self.browse_data1)
    QtCore.QMetaObject.connectSlotsByName(Import_data)

def retranslateUi(self, Import_data):
    _translate = QtCore.QCoreApplication.translate
    Import_data.setWindowTitle(_translate("Import_data", "Import Data"))
    self.pushButton.setText(_translate("Import_data", "Browse"))
    self.label.setText(_translate("Import_data", "Data Path"))
    self.label_2.setText(_translate("Import_data", "Ground Truth Data Path"))
    self.pushButton_2.setText(_translate("Import_data", "Browse"))
    self.pushButton_3.setText(_translate("Import_data", "Apply"))
    self.pushButton_4.setText(_translate("Import_data", "OK"))


if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Import_data = QtWidgets.QDialog()
ui = Ui_Import_data()
ui.setupUi(Import_data)
Import_data.show()
sys.exit(app.exec_())