python - self.Bind 上的 wxPython 方法 "takes 1 positional argument but 2 were given"

Question

我正在尝试用 WxPython 编写一个图形用户界面，但我似乎无法弄清楚如何将方法绑定(bind)到事件。这是我当前的代码:

class nlp_gui_class(wx.Frame):
    def __init__(self, *args, **kw):
        # ensure the parent's __init__ is called
        super(nlp_gui_class, self).__init__(*args, **kw)
        self.file_menu = wx.Menu()
        self.setting_menu = wx.Menu()
        self.menubar = None
        self.filenames = []
        self.createMenuBar()
        self.createFileMenu()
        self.CreateStatusBar()
        self.SetStatusText("Corpus linguistics in Python")
    def createFileMenu(self):
        OPEN_FILE_ID = 101
        open_file_item = self.file_menu.Append(OPEN_FILE_ID, "Open File(s)", "Open file(s)")
        about_item = self.file_menu.Append(wx.ID_ABOUT, "About", "About")
        self.file_menu.Append(wx.ID_EXIT, "Exit", "Close")
        self.Bind(wx.EVT_MENU, self.open_files, open_file_item)
    def createMenuBar(self):
        menuBar = wx.MenuBar()
        menuBar.Append(self.file_menu, "File")  # Adding the "file_menu" to the MenuBar
        self.SetMenuBar(menuBar)  # Adding the MenuBar to the Frame content.
    def open_files(self):
        openFileDialog = wx.FileDialog(frame, "Choose corpus files",
            wx.FD_OPEN | wx.FD_FILE_MUST_EXIST | wx.FD_MULTIPLE)
        openFileDialog.ShowModal()
        self.filenames.extend(openFileDialog.GetPaths())
        openFileDialog.Destroy()

app = wx.App()
# Setting up the menu.
frame = nlp_gui_class(None, -1, 'nlp_gui')
frame.SetSize(0, 0, 200, 50)
# Creating the menubar.
frame.Show()
app.MainLoop()

当我运行程序时，框架和菜单看起来像我期望的那样。但是，只要单击菜单项“打开文件”，就会出现此错误:

TypeError: open_files() takes 1 positional argument but 2 were given

似乎在单击菜单项时传递了一些额外的参数，但我不知道该项目是什么以及我如何修改我的代码以使其正确运行(即函数被成功调用) .我需要在这里更改什么？

编辑:感谢 Patrick Artner 的解决方案。这解决了我发布的问题，然后我意识到我也错误地调用了 wx.FileDialog。这是解决了两个问题的更正代码:

def open_files(self, event=None):
    openFileDialog = wx.FileDialog(frame, message="Choose corpus files", style= wx.FD_OPEN | wx.FD_FILE_MUST_EXIST | wx.FD_MULTIPLE)
    openFileDialog.ShowModal()
    self.filenames.extend(openFileDialog.GetPaths())
    openFileDialog.Destroy()

Answer 1

激活按钮 event被传递到句柄函数中。

参见 dynamic-event-handling一些容易遵循的食谱和一般的事件哭泣。

将函数更改为:

def open_files(self, event=None):
    openFileDialog = wx.FileDialog(frame, "Choose corpus files",
        wx.FD_OPEN | wx.FD_FILE_MUST_EXIST | wx.FD_MULTIPLE)
    openFileDialog.ShowModal()
    self.filenames.extend(openFileDialog.GetPaths())
    openFileDialog.Destroy()