Python Tkinter如何从存储在一个变量中的多个Entry小部件中获取输入

Question

my code is the following.

from tkinter import *
def TakeInput():
    print(tb.get()) #This will print Entry1 input
    print(tb.get()) #This will print Entry2 input
tk=Tk()
#Entry 1
tb=Entry(tk) #Both Entry1 and Entry2 are stored in the same variable: tb
tb.pack()
#Entry 2
tb=Entry(tk) #Both Entry1 and Entry2 are stored in the same variable: tb
tb.pack()
#Button
b=Button(tk,text="PrintInput",command= TakeInput)
b.pack()
tk.mainloop()

All I am trying to do is to display both entry 1 and entry 2 input when both are assigned to the same variable.

Note that I am a Python newbie.

Answer 1

Create a list containing the entries and loop through them.

def print_input(*args):
    for entry in entries:
        print(entry.get())

entries = [Entry(tk) for _ in range(2)]
for entry in entries:
    entry.pack()

btn = Button(tk, text="Print", command=print_input)

In your version, you're assigning tb at first to one entry, then to the other. That's not how you store input from multiple widgets in one variable. You're just overwriting the reference to the first widget you have created and stored.

Answer 2

If you want to do it automatically, you have to control strings in entry widgets when they modified. You can do it with StringVar . You dont need a button, when the entry1's text equals to entry2's text, it will automatically prints.

from tkinter import *

def TakeInput():
    print(tb1.get())
    print(tb2.get())

def on_entry1_changed(*args):
    if sv_entry1.get() == sv_entry2.get():
        TakeInput()

def on_entry2_changed(*args):
    if sv_entry1.get() == sv_entry2.get():
        TakeInput()
tk=Tk()

#Entry 1
sv_entry1 = StringVar()
sv_entry1.set("Entry1 text")
sv_entry1.trace("w", on_entry1_changed)

tb1=Entry(tk, textvariable=sv_entry1)
tb1.pack()

#Entry 2
sv_entry2 = StringVar()
sv_entry2.set("Entry2 text")
sv_entry2.trace("w", on_entry2_changed)

tb2=Entry(tk, textvariable=sv_entry2)
tb2.pack()

tk.mainloop()

If you want to do it with pressing button, you have to modify TakeInput function like this:

from tkinter import *
def TakeInput():
    if tb1.get() == tb2.get():
        print tb1.get()
tk=Tk()

#Entry 1
tb1=Entry(tk)
tb1.pack()

#Entry 2
tb2=Entry(tk)
tb2.pack()

#Button
b=Button(tk,text="PrintInput",command= TakeInput)
b.pack()
tk.mainloop()