from tkinter import *
root=Tk()
entry_text=StringVar(root)
def print_entry_text():
    print(entry_text.get())
e1 = Entry(root,textvariable=entry_text,width=100).pack()
button = Button(root,text='Вывести',height = 1, width =
10,command=print_entry_text).pack()
root.mainloop()