如何返回字典中的函数值

Question

I have a tkinter project that try to make unknown number of Entry and get their value after a button clicked! I tried many ways, but I can not return the Entry value after declared! Here is my approach:

from tkinter import Entry, Tk, Button

l = [50]


def entry(x, y):
    global data
    e = Entry()
    e.place(x=x, y=y, height=20, width=100)
    data = e.get()
    return data


def loop():
    n = 0
    s = l[0]
    for_x = 10
    for_y = 10
    global en
    en = dict()
    while True:
        if n == s:
            break
        else:
            en[n] = entry(for_x, for_y)
            n = n + 1
            if for_y >= 400:
                for_x = for_x + 110
                for_y = 10
                print("110")
            else:
                for_y = for_y + 30
                print("30")
            print("finally")


root = Tk()

root.minsize(500, 500)

loop()


def dp():
    print(en)


b = Button(command=dp)
b.place(x=480, y=400)
root.mainloop()

The dictionary however do show the values, but only values that was at time of widget declaration! I want to get the value of it after declaration! Any ideas?

Answer 1

You are running e.get during the entry box creation. You need to run e.get() in connection with some other event. You also should return the Entry object instead of returning the data for example:

def entry(x, y):
    e = Entry()
    e.place(x=x, y=y, height=20, width=100)
    return e

def loop():
    n = 0
    s = l[0]
    for_x = 10
    for_y = 10

    global entry_list

    entry_list = []  # Used to store all of the entry widgets you make

    while True:
        if n == s:
            break
        else:
            entry_list.append(entry(for_x, for_y)) # Adds a new entry widget to the list
            n = n + 1
            if for_y >= 400:
                for_x = for_x + 110
                for_y = 10
                print("110")
            else:
                for_y = for_y + 30
                print("30")
            print("finally")

def dp():
    # Get the value of each entry box
    en = []
    for e in entry_list:
        en.append(e.get())
    print(en)