Question

我试图使用for循环创建一个用于制作标签和条目的for循环。这是代码：

    r = 1   #r == row
    c = 0   #c == column
    n = 1   #n == number
    a = 2   #a == checking what iteration
    for count in y:                                                                                 #Iterates through y, defined earlier
        if a % 2 == 0:                                                                                   #Checks if a is even
            Label(edit_recipe_window, text="Ingredient " + str(n)).grid(row=r, column=c)
            c += 1
            entry_box= Entry(edit_recipe_window)
            entry_box.grid(row=r, column=c)
            entry_box.insert(0, count)
            c = 0
            a += 1
        else:
            Label(edit_recipe_window, text="Quantity and Unit " + str(n)).grid(row=r, column=c)
            c += 1
            quantity_box = Entry(edit_recipe_window)
            quantity_box.grid(row=r, column=c)
            quantity_box.insert(0, count)
            c = 0
            r += 1
            a += 1
        n += 1

这会产生数量+单位2的标签，这不是期望的结果。

Answer 1

如果您使用print进行调试，则会看到您将每个if-else对上的小部件放在彼此的顶部。

from tkinter import *

edit_recipe_window = Tk()
if 1:
    r = 1   #r == row
    c = 0   #c == column
    n = 1   #n == number
    a = 2   #a == checking what iteration
    y = ["count1","count2","count3","count4","count5"]
    for count in y:
        if a%2 == 0:
            print ("inside if, label values", r, c)
            Label(edit_recipe_window, text="Ingredient " + str(n)).grid(row=r, column=c)
            c += 1
            print("inside if, entry values",r,c)
            entry_box= Entry(edit_recipe_window)
            entry_box.grid(row=r, column=c)
            entry_box.insert(0, count)
            c = 0
            a += 1

        else:
            print ("inside else, label values", r, c)
            Label(edit_recipe_window, text="Quantity and Unit " + str(n)).grid(row=r, column=c)
            c += 1
            print ("inside else, entry values", r, c)
            quantity_box = Entry(edit_recipe_window)
            quantity_box.grid(row=r, column=c)
            quantity_box.insert(0, count)
            c = 0
            r += 1
            a += 1
        n += 1

将为5值y

输出此值

inside if, label values 1 0  
inside if, entry values 1 1  
inside else, label values 1 0  
inside else, entry values 1 1  
inside if, label values 2 0  
inside if, entry values 2 1  
inside else, label values 2 0  
inside else, entry values 2 1  
inside if, label values 3 0  
inside if, entry values 3 1

正如您所看到的，首先它将Label和Entry放入if，然后Label和Entry覆盖了else }。

您可能希望在r += 1的末尾使用if来摆脱覆盖您的小部件。

在for循环中创建标签和条目

1 个答案: