Реорганизована структура проекта.

Лабораторные работы вынесены в отдельные папки

lab1/lab1.py

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+import wx
+
+class Ttheory(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent)
+
+
+class Labs(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent)
+
+class Results(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent)
+
+
+
+class MainFrame(wx.Frame):
+    def __init__(self):
+        wx.Frame.__init__(self, None, title="Simple Notebook Example")
+
+        # Here we create a panel and a notebook on the panel
+        p = wx.Panel(self)
+        nb = wx.Notebook(p)
+
+        # create the page windows as children of the notebook
+        page1 = Ttheory(nb)
+        page2 = Labs(nb)
+        page3 = Results(nb)
+
+        # add the pages to the notebook with the label to show on the tab
+        nb.AddPage(page1, "Теория")
+        nb.AddPage(page2, "Задание")
+        nb.AddPage(page3, "Отчёт")
+
+        # finally, put the notebook in a sizer for the panel to manage
+        # the layout
+        sizer = wx.BoxSizer()
+        sizer.Add(nb, 1, wx.EXPAND)
+        p.SetSizer(sizer)
+
+
+if __name__ == "__main__":
+    app = wx.App()
+    MainFrame().Show()
+    app.MainLoop()