Python: 如何获取PyQt5中选中文件的文件大小？

Question

在 PyQt5 中，可以使用 QFileDialog select 文件。我知道如何获取文件名，但如何获取文件大小？

Answer 1

来自documentation：

The file dialog has two view modes ... Detail also displays a list of file and directory names, but provides additional information alongside each name, such as the file size and modification date. Set the mode with setViewMode():

dialog.setViewMode(QFileDialog::Detail);

Answer 2

不打开文件：

您必须使用QFileInfo class and the size()方法：

filename, _ = QFileDialog.getOpenFileName(None, 'Open file')
if filename != "":
    info = QFileInfo(filename)
    size = info.size()
    print(info)

打开文件：

filename, _ = QFileDialog.getOpenFileName(None, 'Open file')
if filename != "":
    file = QFile(filename)
    if file.open(QFile.ReadOnly):
        print(file.size())