path_entry = Entry(window, width = 39)
start = Button(window, text='Переименовать!', state='disabled')
def check():
if len(path_entry.get()) > 0:
start['state'] = 'enabled'
path_entry.bind('char', check)try:
import tkinter as tk
except ImportError:
import Tkinter as tk
def toggle_state(*_):
if entry.var.get():
button['state'] = 'normal'
else:
button['state'] = 'disabled'
if __name__ == '__main__':
root = tk.Tk()
entry = tk.Entry(root)
entry.var = tk.StringVar()
entry['textvariable'] = entry.var
entry.var.trace_add('write', toggle_state)
button = tk.Button(root, text="Button", state='disabled')
entry.pack()
button.pack()
tk.mainloop()