python - wxpython和类之间共享变量

Question

我看到过可以在类之间共享变量的问题——我通常可以很容易地做到这一点。但是，我试图在 wx.Frame 和自定义列表控件之间共享一个变量。本质上，我有一个带有 Editable ListCtrl 的类，它使用字典对列表中的值进行排序。我通常只是将字典设为全局变量，但我正试图从我的代码中完全删除全局变量。如何从 wx.Frame 类中引用 ListCtrl 类中的字典？下面是代码片段。

谢谢!

class TMainForm(wx.Frame):
    def __init__(self, *args, **kwds):
        kwds["style"] = wx.DEFAULT_FRAME_STYLE
        wx.Frame.__init__(self, *args, **kwds)

        self.Splitter = wx.SplitterWindow(self, -1)

        self.Panel1 = wx.Panel(self.Splitter, -1)          
        self.Panel3 = wx.Panel(self.Splitter, -1)

        self.Splitter.SplitVertically(self.Panel1,self.Panel3,450)

        self.Notebook2 = wx.Notebook(self.Panel1, -1)

        # This is the Panel my list is in
        self.List1 = scrolled.ScrolledPanel(self.Notebook2, -1)
        self.List1.SetupScrolling()

        # This custom function creates the dictionary for list 1 (labeled self.List1Data)
        self.CreateDictionary()

        # This sets up the listctrl to reference the class EditableListCtrl
        self.List1_list = EditableListCtrl(self.List1,-1,style=wx.LC_REPORT|wx.LC_SINGLE_SEL)
        self.List1_list.InsertColumn(1,'Col 1')
        self.List1_list.InsertColumn(2,'Col 2',format=wx.LIST_FORMAT_CENTRE)

        items = self.List1Data.items()
        index = 0

        for key, data in items:
            self.List1_list.InsertStringItem(index, data[0])
            self.List1_list.SetStringItem(index, 1, data[1])
            self.List1_list.SetItemData(index, key)
            index += 1

        self.List1_list.itemDataMap = self.List1Data

        #...


# In this class i have "List1Data" which is a global variable.  I want to grab self.List1Data
# from the TMainForm class and use it in here (instead of the List1Data global variable).

class EditableListCtrl(wx.ListCtrl, listmix.TextEditMixin, listmix.ColumnSorterMixin):
    def __init__(self, parent, ID=wx.ID_ANY, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):
        wx.ListCtrl.__init__(self, parent, ID, pos, size, style)
        listmix.ColumnSorterMixin.__init__(self, len(List1Data))
        self.itemDataMap = List1Data
    def GetListCtrl(self):
        return self

尝试遵循以下建议的答案:

class EditableListCtrl(wx.ListCtrl, listmix.TextEditMixin, listmix.ColumnSorterMixin):

    def __init__(self, parent, ID=wx.ID_ANY, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):
        wx.ListCtrl.__init__(self, parent, ID, pos, size, style)
        listmix.ColumnSorterMixin.__init__(self, len(self.List1Data))
        self.itemDataMap = self.List1Data

    def get_dict(self):
        return self.List1Data

    def GetListCtrl(self):
        return self

* 编辑 **

针对我的问题的完整可运行代码。请参阅评论——我希望能够在 EditableListCtrl 类的 TMainForm 中引用 self.List1Data。谢谢!

import os
import wx
import wx.lib.mixins.listctrl as listmix
import wx.lib.scrolledpanel as scrolled

class TMainForm(wx.Frame):
    def __init__(self, *args, **kwds):
        kwds["style"] = wx.DEFAULT_FRAME_STYLE
        wx.Frame.__init__(self, *args, **kwds)

        self.Splitter = wx.SplitterWindow(self, -1)

        self.Panel1 = wx.Panel(self.Splitter, -1)          
        self.Panel3 = wx.Panel(self.Splitter, -1)

        self.Splitter.SplitVertically(self.Panel1,self.Panel3,450)

        self.Notebook2 = wx.Notebook(self.Panel1, -1)
        self.List1 = scrolled.ScrolledPanel(self.Notebook2, -1)
        self.List1.SetupScrolling()

        self.UpdateData()

        self.List1_list = EditableListCtrl(self.List1,-1,style=wx.LC_REPORT|wx.LC_SINGLE_SEL)
        self.List1_list.InsertColumn(1,'Col 1')
        self.List1_list.InsertColumn(2,'Col 2',format=wx.LIST_FORMAT_CENTRE)

        self.Update_List()

        self.List1_list.SetColumnWidth(0,-2)
        self.List1_list.SetColumnWidth(1,-2)

        self.Notebook3 = wx.Notebook(self.Panel3, -1)
        self.OptPane = scrolled.ScrolledPanel(self.Notebook3, -1)
        self.OptPane.SetupScrolling()

        self.__set_properties()
        self.__do_layout()

    def __set_properties(self): # Set GUI Title and Size

        self.screen_x = 95 * wx.GetDisplaySize()[0]/100
        self.screen_y = 90 * wx.GetDisplaySize()[1]/100

        if wx.GetDisplaySize()[0] < 1920:
            self.Maximize(True)
        else:
            self.SetSize((self.screen_x, self.screen_y))
        self.SetMinSize((1280,768))

        self.SetFocus()


    def __do_layout(self , call_fit = True, set_sizer = True): 

        sizer_22 = wx.BoxSizer(wx.VERTICAL)
        sizer_22.Add(self.List1_list,1,wx.EXPAND)
        self.List1.SetSizer(sizer_22)

        self.Notebook2.AddPage(self.List1,"List1")

        sizer_P2 = wx.BoxSizer(wx.VERTICAL)
        sizer_P2.Add(self.Notebook2, 1, wx.EXPAND, 0)
        self.Panel1.SetSizer(sizer_P2)

        sizer_P3 = wx.BoxSizer(wx.VERTICAL)
        sizer_P3.Add(self.Notebook3, 1, wx.EXPAND, 0)
        self.Panel3.SetSizer(sizer_P3)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.Splitter,1,wx.EXPAND)
        self.SetSizer(sizer)

        self.Layout()
        self.Centre()

    def Update_List(self):

        #items = self.List1Data.items()
        items = LD1.items()
        index = 0

        for key, data in items:
            self.List1_list.InsertStringItem(index, str(data[0]))
            self.List1_list.SetStringItem(index, 1, str(data[1]))

            self.List1_list.SetItemData(index, key)
            index += 1

        #self.List1_list.itemDataMap = self.List1Data
        self.List1_list.itemDataMap = LD1

    def UpdateData(self):

        self.List1Data = {}

        self.List1Data[0] = (1,2,3)
        self.List1Data[1] = (4,5,6)

        global LD1
        LD1 = self.List1Data

class EditableListCtrl(wx.ListCtrl, listmix.TextEditMixin, listmix.ColumnSorterMixin):

    # I want to be able to get self.List1Data from TMainForm here instead of LD1
    #print TMainForm.List1Data

    def __init__(self, parent, ID=wx.ID_ANY, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):

        wx.ListCtrl.__init__(self, parent, ID, pos, size, style)
        listmix.ColumnSorterMixin.__init__(self, len(LD1))
        self.itemDataMap = LD1

    def get_dict(self):
        return self.List1Data

    def GetListCtrl(self):
        return self

app = wx.App(0)
# Code to Execute File
class TApplication(wx.App):
    def OnInit(self):

            wx.InitAllImageHandlers()
            MainForm = TMainForm(None, -1,"")
            self.SetTopWindow(MainForm)

            MainForm.Show()
            return 1

if __name__ == "__main__":
    Application = TApplication(0)
    Application.MainLoop()

尝试访问 TMainForm 中的 List1Data 时出错:

Traceback (most recent call last):
  File "C:/Users/Me/Documents/test.py", line 103, in <module>
    class EditableListCtrl(wx.ListCtrl, listmix.TextEditMixin, listmix.ColumnSorterMixin):
  File "C:/Users/Me/Documents/test.py", line 106, in EditableListCtrl
    print TMainForm.List1Data
AttributeError: type object 'TMainForm' has no attribute 'List1Data'

Answer 1

class EditableListCtrl(wx.ListCtrl, listmix.TextEditMixin, listmix.ColumnSorterMixin):

    List1Data={...dictionary item....}

    def __init__(self):

    ### your other methods now

您可以从其他类的任何地方访问您的 List1Data，只需使用:

EditableListCtrl.List1Data

从现在开始，List1Data 就是您的类定义的一部分。