python - using function from module with button -Tkinter -


so doing learning modules. decent tkinter after using 5 months or so. can work if put functions inside main file. separating them separate modules can learn how work modules better. question more knowledge.

i going have 3 files total, main loop (example_gui.py) , pythonic functions (example_funcs.py) , gui functions (more_example_funcs.py)... can see issue using "get_text()" inside more_example_funcs.py obvious why doesnt work in case. variable not defined inside .py file. how make work? told better way code having functions inside file(modules).

with full scale app using tkinter , going have bunch of functions connected entries such going defined in example_gui.py easier if put functions inside more_example_funcs.py example below

example_funcs.py

from tkinter import * import tkinter tk  def center(toplevel):     toplevel.update_idletasks()     w = toplevel.winfo_screenwidth()     h = toplevel.winfo_screenheight()     size = tuple(int(_) _ in toplevel.geometry().split('+')[0].split('x'))     x = w/2 - size[0]/2     y = h/2 - size[1]/2     toplevel.geometry("%dx%d+%d+%d" % (size + (x, y)))  def popupmsg(msg):     popup = tk.toplevel()     popup.title("information dialog")     label = label(popup, text = msg)     label.pack(side="top", pady=10)     button = button(popup, text = "ok", command = popup.destroy)     button.pack()     popup.grab_set()     center(popup)     popup.mainloop()

more_example_funcs.py

from tkinter import * import tkinter tk  def get_text():     print entry_one_var.get()

example_gui.py

from tkinter import * import tkinter tk import example_funcs ef import more_example_funcs mef  class start(tk.tk):      def __init__(self, *args, **kwargs):          tk.tk.__init__(self, *args, **kwargs)         container = tk.frame(self)         container.pack(side="top", fill="both", expand = true)         container.grid_rowconfigure(0, weight=1)         container.grid_columnconfigure(0, weight=1)         self.frames = {}         tk.tk.title(self, "app name")         menubar = tk.menu(container)         tk.tk.config(self, menu=menubar)         filemenu = tk.menu(menubar, tearoff=0)         menubar.add_cascade(label="file", menu=filemenu)         filemenu.add_command(label="exit", command=quit)          f in (page_one, page_two, page_three):              frame = f(container, self)              self.frames[f] = frame              frame.grid(row=0, column=0, sticky="nsew")           self.show_frame(page_one)      def show_frame(self, cont):          frame = self.frames[cont]         frame.tkraise()  class page_one(tk.frame):      def __init__(self, parent, controller, *args, **kwargs):         self.controller = controller         frame.__init__(self, parent, *args, **kwargs)         self.labels_one()         self.buttons_one()         self.entries_one()      def labels_one(self):         label1 = label(self, text="welcome page one")         label1.grid()      def buttons_one(self):         button_one = button(self, text="go page two", command=lambda:self.controller.show_frame(page_two))         window_one_button = button(self, text="open popup window", command=lambda:ef.popupmsg("new window 1"))         text_one_button = button(self, text="print entered text", command=mef.get_text)         button_one.grid()         window_one_button.grid()         text_one_button.grid()      def entries_one(self):         entry_one_var=stringvar()         entry_one = entry(self, textvariable= entry_one_var)         entry_one.grid()  class page_two(tk.frame):      def __init__(self, parent, controller, *args, **kwargs):         self.controller = controller         frame.__init__(self, parent, *args, **kwargs)         self.labels_two()         self.buttons_two()      def labels_two(self):         label2 = label(self, text="welcome page two")         label2.grid()      def buttons_two(self):         button_two = button(self, text="go page three", command=lambda:self.controller.show_frame(page_three))         window_two_button = button(self, text="open popup window", command=lambda:ef.popupmsg("new window 2"))         button_two.grid()         window_two_button.grid()  class page_three(tk.frame):      def __init__(self, parent, controller, *args, **kwargs):         self.controller = controller         frame.__init__(self, parent, *args, **kwargs)         self.labels_three()         self.buttons_three()      def labels_three(self):         label3 = label(self, text="welcome page three")         label3.grid()      def buttons_three(self):         button_three = button(self, text="go page one", command=lambda:self.controller.show_frame(page_one))         window_three_button = button(self, text="open popup window", command=lambda:ef.popupmsg("new window 3"))         button_three.grid()         window_three_button.grid()  app = start() ef.center(app) app.mainloop()

make get_text function take arguments can call on variable later.

more_example_funcs.py

from tkinter import * import tkinter tk  def get_text(var):     print var.get()

also, make entry_one_var in page_one class variable using self keyword (self.entry_one_var) since you'll need in more 1 method, pass self.entry_one_var argument when call get_text.

this how page_one class like:

class page_one(tk.frame):      def __init__(self, parent, controller, *args, **kwargs):         self.controller = controller         frame.__init__(self, parent, *args, **kwargs)         self.labels_one()         self.buttons_one()         self.entries_one()      def labels_one(self):         label1 = label(self, text="welcome page one")         label1.grid()      def buttons_one(self):         button_one = button(self, text="go page two", command=lambda:self.controller.show_frame(page_two))         window_one_button = button(self, text="open popup window", command=lambda:ef.popupmsg("new window 1"))         text_one_button = button(self, text="print entered text", command=lambda: mef.get_text(self.entry_one_var))##         button_one.grid()         window_one_button.grid()         text_one_button.grid()      def entries_one(self):         self.entry_one_var=stringvar() #make entry_one_var class instance variable         entry_one = entry(self, textvariable= self.entry_one_var) ##         entry_one.grid()

i hope helps.


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