Question

我想制作一个3x3的条目矩阵和那些我希望它们互相交互的条目。

我希望每次引入浮点值然后按条目内的Enter键（仅在第一列和第二列）我希望第三列显示行中第一列和第二列的总和被修改了。

像这样：

|   0.0|   2.5|   2.5|
|   2.4|   1.5|   3.9|
|   1.1|   2.2|   3.3|

这是我的代码：

from Tkinter import *

global i,j,m

def compute(master):
    suma=0.0
    for x in range (0,1):
        suma+=float(m[i][x].get())
    if not i==0:
        suma+=float(m[i-1][2].get())
    print suma
    m[i][2].insert(str(suma))


root = Tk()

alto =3
ancho=3


m = [[0 for x in range(alto)] for y in range(ancho)]



for i in range (0, alto):
    for j in range (0, ancho):
        m[i][j]= Entry(root)
        m[i][j].grid(row = i,column = j)
        m[i][j].insert(0,"0.0")
        if (j==0 or j==1):
            m[i][j].bind('<Return>', compute)
        else:
            m[i][j].config(state='readonly')

root.mainloop()

按Enter键时，如何修改条目索引？

我知道这可能是比较变量矩阵和所有条目的当前值，但可能会使用大量资源，因为在此旁边我将使用具有大量值的数据库。

Answer 1

在我看来，您已经学习如何调试代码，因为有许多小错误。下面是您的代码，其中包含一些您已经做错的事情的注释，可以通过一些简单的调试找到。在发布到这里之前，请花些时间尝试解决这些问题。

from Tkinter import *

global i, j, m

# "You should rename master because that is a very misleading name. The 
#  canonical name is event, though some prefer evt." – Bryan Oakley
def compute(master):
    suma = 0.0
    # This for loop will only iterate once. You need range(0, 2): for it to go
    # through the code twice
    for x in range(0, 1):
        suma += float(m[i][x].get())

    # I can't figure out the purpoes of this
    if not i == 0:
        suma += float(m[i - 1][2].get())
    print suma

    # You've done it properly in the for loop, but not here. insert() needs an
    # index as its first parameter
    m[i][2].insert(str(suma))


root = Tk()

alto = 3
ancho = 3
m = [[0 for x in range(alto)] for y in range(ancho)]

# Because i is a global, and the below for loop, i is only ever going to
# be equal to 2, which means your compute code is only going to compute
# the 3rd row.
for i in range(0, alto):
    for j in range(0, ancho):
        m[i][j] = Entry(root)
        m[i][j].grid(row=i, column=j)
        m[i][j].insert(0, "0.0")
        if (j == 0 or j == 1):
            m[i][j].bind('<Return>', compute)
        else:
            m[i][j].config(state='readonly')

root.mainloop()

这是您的计算功能的固定版本。请花点时间了解我所做的改变。

def compute(master):
    # Loop through each row in the grid
    for i in range(0, alto):
        suma = 0.0
        for x in range(0, 2):
            # I've left in the prints I've used to debug as exmaples for you
            print "i", i
            print "get", m[i][x].get()
            suma += float(m[i][x].get())
        print "suma", suma, "\n"
        # You cannot insert into a readonly entry, so set it to normal first
        m[i][2].config(state='normal')
        # Inserting every time will add the string to the beginning of the
        # entry, so that it builds up on every run. Instead delte the conetents
        # of the entry first, and then insert.
        m[i][2].delete(0, END)
        m[i][2].insert(0, str(suma))
        # Set the entry back to readonly
        m[i][2].config(state='readonly')

Answer 2

非常感谢你的帮助。我是python和tkinter的新手。我解决了这个问题。特别感谢：

Bryan Oakley和Jordan Gleeson

以下是解决方案：

from Tkinter import *

global m

def indexes(event):
    for i in range(0, 3):
        for j in range(0, 3):
            if event.widget == m[i][j]:
                return i,j

def compute(event):
    i,j = indexes(event)

    suma=0.0
    for x in range (0,2):
        suma+=float(m[i][x].get())

    m[i][2].config(state='normal')
    m[i][2].delete(0, END)
    m[i][2].insert(0,str(suma))
    m[i][2].config(state='readonly')



root = Tk()

alto =3
ancho=3

sv = [[0 for x in range(alto)] for y in range(ancho)]
m = [[0 for x in range(alto)] for y in range(ancho)]

for i in range (0, alto):
    for j in range (0, ancho):
        #sv [i] [j] = StringVar()
        #sv[i][j] = "0.0"
        m[i][j]= Entry(root)#, textvariable=sv [i] [j])
        m[i][j].grid(row = i,column = j)
        m[i][j].insert(0,"0.0")
        if (j==0 or j==1):
            m[i][j].bind('<Return>', compute)
        else:
            m[i][j].config(state='readonly')   

root.mainloop()

获取填充条目的Matrix的索引

2 个答案: