first gui app.py

import Tkinter

class simpleapp_tk(Tkinter.Tk):
21def __init__(self,parent):
		Tkinter.Tk.__init__(self,parent)
		self.parent = parent
		self.initialize()

	def initialize(self):
		self.grid() #.grid() Layout type, in a grid you put objects by telling python the position of things (column=x, row=y)

		self.entryVariable = Tkinter.StringVar()
		self.entry = Tkinter.Entry(self, textvariable=self.entryVariable)
		self.entry.grid(column=0, row=0, sticky='EW') # .entry is for text entries
		self.entry.bind("<Return>", self.OnPressEnter) # here we bind the method that will be called when we press Enter
		self.entryVariable.set(u"Enter text here.")

		button = Tkinter.Button(self, text=u"Click me !",
								command=self.OnButtonClick) # here we bind the method that will be called when we click the button
		button.grid(column=1, row=0) # .button obviously you know wtf a button is.

		self.labelVariable = Tkinter.StringVar() # we set up a special variable to the label then bind it to the label.
		label = Tkinter.Label(self, textvariable=self.labelVariable,
								anchor="w", fg="white", bg="black") # .label here you will set the configs of a LABEL, in the indented with (self, are the configurations of the color.
		label.grid(column=0, row=1, columnspan=2, sticky='EW')
		self.labelVariable.set(u"Hello !")

		self.grid_columnconfigure(0, weight=1) # when you resize the program the COLUMNS=0 will resize too horizontaly.
		self.resizable(True, False) # .resizable(Horizontaly, Verticaly) how the program will be resized (True, False) the program will resize horizontaly but not verticaly.
		self.update()
		self.geometry(self.geometry()) # this will give the program the ability to keep geometric.
		self.entry.focus_set()
		self.entry.selection_range(0, Tkinter.END)

	def OnButtonClick(self):
		self.labelVariable.set(self.entryVariable.get()+" (You clicked the button !)" ) # function that will be executed when you click the button.
		self.entry.focus_set()
		self.entry.selection_range(0, Tkinter.END)

	def OnPressEnter(self, event):
		self.labelVariable.set(self.entryVariable.get()+" (You pressed enter !)" ) # function for when you press enter
		self.entry.focus_set()
		self.entry.selection_range(0, Tkinter.END)

if __name__ == "__main__":
	app = simpleapp_tk(None)
	app.title('my application')
	app.mainloop() # the program wil have a infite loop, this will keep it open until the user do something.