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POTkinter Freeze on grid_remove
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copied!<p>So I am trying to build a GUI where I enter some information, clear the entry fields, and then add new entry fields. However, when I try to clear the frame from the root via grid_remove, the application freezes. The relevant code is below.</p> <pre><code>import tkinter from threading import Thread class PinGui(tkinter.Frame): def __init__(self, client): self.client = client self.root = client.root self.add_pin = client.add_pin self.end = client.end tkinter.Frame.__init__(self, self.root) self.grid_widgets() self.grid_buttons() self.bind_keys() self.grid(padx=32, pady=32) def grid_buttons(self, b1='Add', b2='Reset', b3='Quit'): self.addButton = tkinter.Button(self, text=b1, command=self.validate) self.resetButton = tkinter.Button(self, text=b2, command=self.reset) self.quitButton = tkinter.Button(self, text=b3, command=self.end) self.buttons = [self.addButton, self.resetButton, self.quitButton] for i in range(3): self.buttons[i].grid(row=i, column=11) def grid_widgets(self): widths = [3,3,4,4,6] self.pin_vars = [] self.pin_fields = [] for i in range(5): self.pin_vars.append(tkinter.StringVar()) self.pin_fields.append( tkinter.Entry(self,width=widths[i], textvariable=self.pin_vars[i]) ) self.pin_fields[i].grid(row=0, column=2*i, padx=3) self.pin_fields[0].focus_set() def bind_keys(self): self.root.bind_all("<Return>", self.validate) self.root.bind_all("<Escape>", self.end) def validate(self, args=None): self.client.pin = [] for field in self.pin_fields: self.client.pin.append(field.get()) Thread(target=self.add_pin).start() def ungrid(self): for field in self.pin_fields: field.grid_remove() for button in self.buttons: button.grid_remove() self.display.grid_remove() </code></pre> <p>And:</p> <pre><code>class PinClient: def __init__(self): self.root = tkinter.Tk() self.gui = PinGui(self) self.pins = [] def add_pin(self): self.gui.reset() if 'display' in self.__dict__: self.pins.append(self.pin) self.display.add_pin(self.pin) self.ping("Enter PIN for Comp %s:" % len(self.display.col1)) if len(self.display.col1) > 5: self.end() # THIS IS WHERE IT FREEZES else: self.subject = self.pin self.display = Display(self.root, self.pin) self.display.grid(row=1, padx=32, pady=32) self.ping("Enter PIN for Comp 1:") def ping(self, msg): self.gui.d_var.set(msg) def end(self, args=None): self.gui.ungrid() class Display(tkinter.Frame): def __init__(self, master, pin): tkinter.Frame.__init__(self, master) self.pin = pin self.col1 = [] self.col2 = [] self.col1.append(tkinter.Label(self, text="Subject:")) self.col2.append(tkinter.Label(self, text=self.pin)) self.grid_widgets() def grid_widgets(self): self.ungrid() for i in range(len(self.col1)): self.col1[i].grid(row=i, column=0) self.col2[i].grid(row=i, column=1) def ungrid(self): for i in range(len(self.col1)): self.col1[i].grid_remove() self.col2[i].grid_remove() def add_pin(self, pin): self.col1.append(tkinter.Label(self, text="Comp %s:" % len(self.col1))) self.col2.append(tkinter.Label(self, text=pin)) i = len(self.col1) self.col1[i-1].grid(row=i, column=0) self.col2[i-1].grid(row=i, column=1) </code></pre> <p>It seems to be somehow related to the threading, but I haven't been able to find any reason this should freeze. Any help is greatly appreciated!</p>

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