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$$QFileDialog$$

import sysimport osfrom PyQt5.QtWidgets import *class MainForm(QWidget):    def __init__(self, name = 'MainForm'):        super(MainForm,self).__init__()        self.setWindowTitle(name)        self.cwd = os.getcwd() # 获取当前程序文件位置        self.resize(300,200)   # 设置窗体大小        # btn 1        self.btn_chooseDir = QPushButton(self)          self.btn_chooseDir.setObjectName("btn_chooseDir")          self.btn_chooseDir.setText("选择文件夹")        # btn 2        self.btn_chooseFile = QPushButton(self)          self.btn_chooseFile.setObjectName("btn_chooseFile")          self.btn_chooseFile.setText("选取文件")        # btn 3        self.btn_chooseMutiFile = QPushButton(self)          self.btn_chooseMutiFile.setObjectName("btn_chooseMutiFile")          self.btn_chooseMutiFile.setText("多文件选择")        # btn 4        self.btn_saveFile = QPushButton(self)          self.btn_saveFile.setObjectName("btn_saveFile")          self.btn_saveFile.setText("文件保存")        # 设置布局        layout = QVBoxLayout()        layout.addWidget(self.btn_chooseDir)        layout.addWidget(self.btn_chooseFile)        layout.addWidget(self.btn_chooseMutiFile)        layout.addWidget(self.btn_saveFile)        self.setLayout(layout)        # 设置信号        self.btn_chooseDir.clicked.connect(self.slot_btn_chooseDir)        self.btn_chooseFile.clicked.connect(self.slot_btn_chooseFile)        self.btn_chooseMutiFile.clicked.connect(self.slot_btn_chooseMutiFile)        self.btn_saveFile.clicked.connect(self.slot_btn_saveFile)    def slot_btn_chooseDir(self):        dir_choose = QFileDialog.getExistingDirectory(self,                                      "选取文件夹",                                      self.cwd) # 起始路径        if dir_choose == "":            print("\n取消选择")            return        print("\n你选择的文件夹为:")        print(dir_choose)    def slot_btn_chooseFile(self):        fileName_choose, filetype = QFileDialog.getOpenFileName(self,                                      "选取文件",                                      self.cwd, # 起始路径                                     "All Files (*);;Text Files (*.txt)")   # 设置文件扩展名过滤,用双分号间隔        if fileName_choose == "":            print("\n取消选择")            return        print("\n你选择的文件为:")        print(fileName_choose)        print("文件筛选器类型: ",filetype)    def slot_btn_chooseMutiFile(self):        files, filetype = QFileDialog.getOpenFileNames(self,                                      "多文件选择",                                      self.cwd, # 起始路径                                     "All Files (*);;PDF Files (*.pdf);;Text Files (*.txt)")          if len(files) == 0:            print("\n取消选择")            return        print("\n你选择的文件为:")        for file in files:            print(file)        print("文件筛选器类型: ",filetype)    def slot_btn_saveFile(self):        fileName_choose, filetype = QFileDialog.getSaveFileName(self,                                      "文件保存",                                      self.cwd, # 起始路径                                     "All Files (*);;Text Files (*.txt)")          if fileName_choose == "":            print("\n取消选择")            return        print("\n你选择要保存的文件为:")        print(fileName_choose)        print("文件筛选器类型: ",filetype)if __name__=="__main__":    app = QApplication(sys.argv)    mainForm = MainForm('测试QFileDialog')    mainForm.show()    sys.exit(app.exec_())

标题

from PyQt5.Qt import *import sysimport osimport pydicomfrom resources.main_window_ui import Ui_MainWindowclass MyMainWindow(QMainWindow, Ui_MainWindow):    def __init__(self, parent=None):        super(MyMainWindow, self).__init__(parent)        self.setupUi(self)        self.open_file.triggered.connect(self.call_back_action_open_file)        self.open_dir.triggered.connect(self.call_back_action_store_dir)        self.cwd = os.getcwd()        self.dir_model = QFileSystemModel()    def call_back_action_open_file(self):        print("call_back_action_open_file")        fileName_choose, filetype = QFileDialog.getOpenFileName(self,                                                                "选取文件",                                                                self.cwd,  # 起始路径                                                                "All Files (*);;Text Files (*.txt)")  # 设置文件扩展名过滤,用双分号间隔        if fileName_choose == "":            print("\n取消选择")            return        print("\n你选择的文件夹为:")        print(fileName_choose)        dir_model = QFileSystemModel()        dir_model.setRootPath(fileName_choose)        self.file_dir_tree.setModel(dir_model)        self.file_dir_tree.setRootIndex(dir_model.index(fileName_choose))    def call_back_action_store_dir(self):        dir_choose = QFileDialog.getExistingDirectory(self,                                                      "选取文件夹",                                                      self.cwd)  # 起始路径        if dir_choose == "":            print("\n取消选择")            return        print("\n你选择的文件夹为:")        print(dir_choose)        self.dir_model.setRootPath(dir_choose)        self.file_dir_tree.setModel(self.dir_model)        self.file_dir_tree.setRootIndex(self.dir_model.index(dir_choose))        self.file_dir_tree.doubleClicked.connect(self.test)        print("call_back_action_store_dir")    def test(self, signal):        file_path=self.dir_model.filePath(signal)        print(file_path)if __name__ == "__main__":    app = QApplication(sys.argv)    myWin = MyMainWindow()    myWin.show()    sys.exit(app.exec_())