Python 创建一个能够筛选文件的PDF合并工具

合并多个 PDF 文件。这款 PDF 合并工具允许用户浏览文件夹、选择 PDF 文件，并将其合并为一个新的 PDF 文件。我们将详细分析代码结构和如何一步步实现每个功能。
C:\pythoncode\new\PDFFileInFolderMergeToNewPDFFile.py

全部代码

import os
import wx
import PyPDF2

class PDFMergerFrame(wx.Frame):
    def __init__(self, parent, title):
        super(PDFMergerFrame, self).__init__(parent, title=title, size=(900, 600))
        
        # Create main panel
        self.panel = wx.Panel(self)
        
        # Create toolbar
        self.toolbar = self.CreateToolBar()
        
        # Add toolbar buttons
        browse_tool = self.toolbar.AddTool(wx.ID_ANY, "浏览", wx.ArtProvider.GetBitmap(wx.ART_FOLDER_OPEN), "浏览文件夹")
        merge_tool = self.toolbar.AddTool(wx.ID_ANY, "合成", wx.ArtProvider.GetBitmap(wx.ART_NEW), "合成PDF文件")
        self.toolbar.Realize()
        
        # Bind toolbar events
        self.Bind(wx.EVT_TOOL, self.on_browse, browse_tool)
        self.Bind(wx.EVT_TOOL, self.on_merge, merge_tool)
        
        # Create main sizer
        main_sizer = wx.BoxSizer(wx.HORIZONTAL)
        
        # Create left panel for folders
        left_panel = wx.Panel(self.panel)
        left_sizer = wx.BoxSizer(wx.VERTICAL)
        
        folder_label = wx.StaticText(left_panel, label="文件夹:")
        self.folder_listbox = wx.ListBox(left_panel, size=(200, -1), style=wx.LB_SINGLE)
        
        left_sizer.Add(folder_label, 0, wx.ALL, 5)
        left_sizer.Add(self.folder_listbox, 1, wx.EXPAND | wx.ALL, 5)
        left_panel.SetSizer(left_sizer)
        
        # Create middle panel for files
        middle_panel = wx.Panel(self.panel)
        middle_sizer = wx.BoxSizer(wx.VERTICAL)
        
        file_label = wx.StaticText(middle_panel, label="子文件:")
        self.file_listbox = wx.ListBox(middle_panel, size=(200, -1), style=wx.LB_SINGLE)
        
        middle_sizer.Add(file_label, 0, wx.ALL, 5)
        middle_sizer.Add(self.file_listbox, 1, wx.EXPAND | wx.ALL, 5)
        middle_panel.SetSizer(middle_sizer)
        
        # Create button panel
        button_panel = wx.Panel(self.panel)
        button_sizer = wx.BoxSizer(wx.VERTICAL)
        
        add_button = wx.Button(button_panel, label=">")
        remove_button = wx.Button(button_panel, label="<")
        
        button_sizer.Add(add_button