我想在tkinter按鈕中放置不同的命令（由for()制作）

from tkinter import *

window2 = Tk()
Var = ' '
store = ['a',  'b',  'c', 'd']
count = 3

for i in store:
    if i != None:
        chs_store = Button(window2, text = i).grid(row = count  , column = 4)
        count  = 1

我制作了按鈕并將它們放在這樣的框架上。為了放置按鈕與串列的順序相同。現在我想將不同的命令放入每個按鈕。

ex) 如果我點擊顯示“a”的按鈕，我想要Var = 'one'，如果我點擊按鈕“b”，我想要Var = 'two'。

我該如何解決這個問題

uj5u.com熱心網友回復：

將每個命令功能放在類似于您正在使用的串列中store

# define the functions you want your buttons to call up here, e.g.:
def func_a():
    print('hello!')

# note: no parentheses () since you're not calling these functions here!
commands = [func_a, func_b, func_c, func_d]
store = ['a', 'b',  'c', 'd']
count = 3

for index, i in enumerate(store):
    if i != None:
        chs_store = Button(window2, text=i, command=commands[index])
        # place your buttons on the grid in a separate line since 'grid' returns
        # None, which means chs_store will have no value anyway
        chs_store.grid(row=count, column=4)
        count  = 1

uj5u.com熱心網友回復：

僅基于提供的代碼，您可以為所選專案的位置store定義另一個串列：

store = ["a", "b", "c", "d"]
position = ["one", "two", "three", "four"]

然后在點擊某個按鈕時列印相應的位置。

下面是修改后的代碼：

from tkinter import *

window2 = Tk()

Var = ' '
store = ['a', 'b', 'c', 'd']
position = ['one', 'two', 'three', 'four']

def update_var(pos):
    global Var
    Var = pos
    print(f"{Var=}")

count = 3
for i, pos in zip(store, position):
    Button(window2, text=i, command=lambda pos=pos: update_var(pos)).grid(row=count, column=4)
    count  = 1

window2.mainloop()

uj5u.com熱心網友回復：

如果你列印出 chs_store 你會看到 None，因為你沒有存盤按鈕物件，而是網格方法的結果。因此，最好將它們分開。為了不做計數器，我使用了enumerate函式。我將需要附加到按鈕的功能放在一個元組中。

from tkinter import *


def fun_a():
    global Var
    Var = 'a'
    print('Var = ', Var)


def fun_b():
    global Var
    Var = 'b'
    print('Var = ', Var)


def fun_c():
    global Var
    Var = 'c'
    print('Var = ', Var)


def fun_d():
    global Var
    Var = 'd'
    print('Var = ', Var)


window2 = Tk()
Var = ' '
funs = (fun_a, fun_b, fun_c, fun_d)
store = ('a', 'b', 'c', 'd')
btns = []

for i, st in enumerate(store):
    b = Button(window2, text=st, command=funs[i])
    b.grid(row=i, column=4)
    btns.append(b)
print(btns)
window2.mainloop()

[<tkinter.Button object .!button>, <tkinter.Button object .!button2>, <tkinter.Button object .!button3>, <tkinter.Button object .!button4>]

Var =  a
Var =  b
Var =  c
Var =  d

如果您不需要為每個按鈕提供單獨的功能，則可以縮短代碼。我將按鈕保存在一個串列中，因為變數 b 在回圈的每次迭代中都會被覆寫。

from tkinter import *
from functools import partial


def fun(s):
    global Var
    Var = s
    print('Var = ', Var)


window2 = Tk()
Var = ' '

store = ('a', 'b', 'c', 'd')
btns = []

for i, st in enumerate(store):
    b = Button(window2, text=st, command=partial(fun, st))
    b.grid(row=i, column=4)
    btns.append(b)

window2.mainloop()

標籤：Pythontkinter按钮命令

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