[WxPython] accessing wxwidgets

[Yoriz]

To enable frame.label_1.Hide() to work, label_1 needs to be an attribute of MyFrame in first.py
to do this change label_1 to self.label_1

The code you posted did not run, I tided it up and made it runnable
first.py

import wx


class MyFrame(wx.Frame):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self._create_controls()
        self._setup()
        self._create_sizers()
        self._create_binds()

    def on_button_1(self, event):
        print("Event handler 'on_button_1' not implemented!")
        event.Skip()

    def _create_controls(self):
        self.panel_1 = wx.Panel(self, wx.ID_ANY)
        self.label_1 = wx.StaticText(
            self.panel_1, label="Password:", style=wx.ALIGN_CENTER_HORIZONTAL
        )
        self.button_1 = wx.Button(self.panel_1, label="hide")

    def _setup(self):
        self.SetSize((400, 300))
        self.SetTitle("first")
        width, height = 80, 30
        self.label_1.SetMinSize((width, height))
        self.label_1.SetFont(
            wx.Font(
                12,
                wx.FONTFAMILY_DEFAULT,
                wx.FONTSTYLE_NORMAL,
                wx.FONTWEIGHT_BOLD,
                0,
                "",
            )
        )
        width, height = 80, 23
        self.button_1.SetMinSize((width, height))

    def _create_sizers(self):
        panel_sizer = wx.BoxSizer(wx.VERTICAL)
        self.panel_1.SetSizer(panel_sizer)
        # sizer_1.Add(label_1, 0, wx.LEFT, 50) # sizer_1 not defined
        # sizer_1.Add(sizer_4, 1, wx.EXPAND, 0) # sizer_1 & sizer_4 not defined
        # sizer_1.Add(button_1, 1, wx.LEFT, 50) # sizer_1 missing, button_1 not defined
        # sizer_1 = wx.BoxSizer(orient=wx.VERTICAL)
        panel_sizer.Add(self.label_1, 0, wx.LEFT, 50)
        panel_sizer.Add(self.button_1, 1, wx.LEFT, 50)
        self.panel_1.Layout()

    def _create_binds(self):
        # self.Bind(wx.EVT_BUTTON, self.hide, self.button_1) # do the bind directly on the button instance as follows
        self.button_1.Bind(wx.EVT_BUTTON, self.on_button_1)


class MyApp(wx.App):
    def OnInit(self):
        self.frame = MyFrame(None)
        self.SetTopWindow(self.frame)
        self.frame.Show()
        return True


if __name__ == "__main__":
    my_app = MyApp(False)
    my_app.MainLoop()

second.py

import wx

import first


# class MyApp(fileHide.MyFrame): # fileHide not defined
class MyFrame2(first.MyFrame):
    def __init__(self, parent):
        super().__init__(parent)

    def on_button_1(self, event):
        print("hide")
        self.button_1.Hide()


if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame2(None)
    frame.Show(True)
    frame.label_1.Hide()
    app.MainLoop()