求一个用python做一个程序，获取纯文字txt中某个文字在文档中的第几行第几列

with open('d:/atxt','r',encoding='utf-8') as f:

address=[]

n=0

for x in freadlines():

n+=1

if '某' in x:

addressappend('{}行{}列'format(n,xindex('某')+1))

print(address)

我在Tkinter用Treeview做了一张桌子。我想将第6列中的所有值相加，并在输入框中显示该数字。我该怎么做？我不知道如何从treeview表中获取值，然后以有意义的方式使用它们。get（）不存在。get\u子项根本不起作用。谢谢你的帮助

from tkinter import

from tkinter import ttk

f1= tk()

rootgeometry("750x500")

Invoice_Maker = LabelFrame(f1, text = "Invoice")

Invoice_Makergrid(row=8,column=0,columnspan=4)

Qty_Label = Label(Invoice_Maker, text = " Qty:")

Qty_Labelgrid(row=0,column=0)

Quantity_Box = Entry(Invoice_Maker, width=15)

Quantity_Boxgrid(row=0,column=1)

clicked = StringVar()

clickedset("Select Item")

Dropdown = OptionMenu(Invoice_Maker, clicked, "Bandana", "Du-Rag/Stocking cap",

"Winter Hats", "Gloves", "A-shirt", "Belt",

"Capdana", "Mask", "Sleeve","T-shirt RoundNeck", "T-shirt V-Neck",

"T-shirt LongSleeve","Japanese Hat", "Sunglass", "Small Straw Hat", "Cap",

"Bucket Hat", "Safari Hat", "Large Straw Hat", "Banded Straw Hat",

"Neon T-Shirt", "Panama Jack", "Lady Hats", "Fedora", "Straw Hat Ranchero",

"Team Hats", "Speedy Hat", "Misc", "Bike Tires", "Machetes", "Balones")

Dropdowngrid(row=0, column=2)

Style_Label = Label(Invoice_Maker, text = "Style:")

Style_Labelgrid(row = 0, column = 3)

StyleMenu = StringVar()

StyleMenuset("N/A")

Style = OptionMenu(Invoice_Maker,StyleMenu, "Plain","Camo","Neon")

Stylegrid(row=0,column=4)

Cost_Label = Label(Invoice_Maker,text = "Cost:")

Cost_Labelgrid(row=0,column=5)

Cost = Entry(Invoice_Maker, width=7)

Costgrid(row=0, column=6)

Retail_Label = Label(Invoice_Maker,text = "Retail:")

Retail_Labelgrid(row=0,column=7)

Retail = Entry(Invoice_Maker, width=7)

Retailgrid(row=0, column=8)

Inv_Frame = LabelFrame(Invoice_Maker, bg="red")

Inv_Framegrid(row=1,column=0,columnspan=10)

global Trv

Trv = ttkTreeview(Inv_Frame)

Trvpack(side=RIGHT)

Trv["columns"] = ("2","3","4","5","6")

Trvcolumn("#0", width = 40)

Trvcolumn(1, width = 80)

Trvcolumn(2, width = 80)

Trvcolumn(3, width = 80)

Trvcolumn(4, width = 80)

Trvcolumn(5, width = 80)

Trvcolumn(6, width = 80)

Trvheading("#0", text="#", anchor=W)

Trvheading(1, text="Quantity", anchor=W)

Trvheading(2, text="Item", anchor=W)

Trvheading(3, text="Style", anchor=W)

Trvheading(4, text="Cost", anchor=W)

Trvheading(5, text="Retail", anchor=W)

Trvheading(6, text="Total", anchor=W)

Scroll = Scrollbar(Inv_Frame, orient="vertical", command=Trvyview)

Scrollpack(side=LEFT, fill="y")

def Add_Item():

Trvinsert("",END,text=Quantity_Boxget(), values=(clickedget(),StyleMenuget(),Costget(),

Retailget(),str(float(Quantity_Boxget())float(Costget()))))

Total_Label = Label(Invoice_Maker, text="Total: ")

Total_Labelgrid(row=3,column=8)

Total_Box = Entry(Invoice_Maker,width=10)#This is where I want the total of the numbers in row 6 to go

Total_Boxgrid(row=3,column=9)

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