PyQt5 支持（本机）文件对话框：打开文件，打开文件和保存文件。 通过调用 PyQt5 中包含的功能，您将获得默认的文件对话框，而无需从头开始重新创建这些对话框。
需要导入QFileDialog。
使用的方法是QFileDialog.getOpenFileName()，QFileDialog.getOpenFileNames()，QFileDialog.getSaveFileName()。 使用方法参数可以指定默认目录，文件类型和默认文件名。
下面的代码将显示所有文件对话框：
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit, QFileDialog
from PyQt5.QtGui import QIcon
class App(QWidget):
def __init__(self):
super().__init__()
self.title = 'PyQt5 file dialogs - pythonspot.com'
self.left = 10
self.top = 10
self.width = 640
self.height = 480
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
self.openFileNameDialog()
self.openFileNamesDialog()
self.saveFileDialog()
self.show()
def openFileNameDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
fileName, _ = QFileDialog.getOpenFileName(self,"QFileDialog.getOpenFileName()", "","All Files (*);;Python Files (*.py)", options=options)
if fileName:
print(fileName)
def openFileNamesDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
files, _ = QFileDialog.getOpenFileNames(self,"QFileDialog.getOpenFileNames()", "","All Files (*);;Python Files (*.py)", options=options)
if files:
print(files)
def saveFileDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
fileName, _ = QFileDialog.getSaveFileName(self,"QFileDialog.getSaveFileName()","","All Files (*);;Text Files (*.txt)", options=options)
if fileName:
print(fileName)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())