今天想写一个文件管理器，结果整了一下午，还是自己看的源代码少，分析别人代码少，最终还是看别人代码才找到错误原因。
#!/usr/bin/env python
import sys
import os
import PySimpleGUI as sg

sg.theme('light brown 8')


"""
    Demo program that will display a folder hierarchy with icons for the folders and files.
    Note that if you are scanning a large folder then tkinter will eventually complain about too many bitmaps.
    This can be fixed easily enough by reusing the images within PySimpleGUI (enhancement request can be opened if you hit this problem)
"""

# Base64 versions of images of a folder and a file. PNG files (may not work with PySimpleGUI27, swap with GIFs)

folder_icon = b'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'
file_icon = b'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'

starting_path = sg.popup_get_folder('Folder to display')

if not starting_path:
    sys.exit(0)

treedata = sg.TreeData()


def add_files_in_folder(parent, dirname):
    files = os.listdir(dirname)
    for f in files:
        fullname = os.path.join(dirname, f)
        if os.path.isdir(fullname):            # if it's a folder, add folder and recurse
            treedata.Insert(parent, fullname, f, values=[], icon=folder_icon)
            add_files_in_folder(fullname, fullname)
        else:
            treedata.Insert(parent, fullname, f, values=[os.stat(fullname).st_size], icon=file_icon)

add_files_in_folder('', starting_path)

layout = [[sg.Text('File and folder browser Test')],
          [sg.Tree(data=treedata,
                   # headings=['Size', ],
                   # auto_size_columns=True,
                   # select_mode=sg.TABLE_SELECT_MODE_EXTENDED,
                   # num_rows=20,
                   # col0_width=40,
                   # key='-TREE-',
                   # show_expanded=False,
                   # enable_events=True,
                   # expand_x=True,
                   # expand_y=True,
                   ),],
          [sg.Button('Ok'), sg.Button('Cancel')]]

window = sg.Window('Tree Element Test', layout, resizable=True, finalize=True)

while True:     # Event Loop
    event, values = window.read()
    if event in (sg.WIN_CLOSED, 'Cancel'):
        break
    print(event, values)
window.close()







# See PyCharm help at https://www.jetbrains.com/help/pycharm/

参考资料：

1] GitHub 仓库: https://github.com/PySimpleGUI/PySimpleGUI

[2] 200 多个示例程序: https://github.com/PySimpleGUI/PySimpleGUI/tree/master/DemoPrograms