在通过ElementTree和Tkinter图形用户界面向XML文件中删除和添加元素时，我遇到了一个问题.
这只是一段代码的简化部分，这就是为什么我的命名约定可能看起来有点奇怪，而且我也是相当新手(我是12年级的)，尽管如此:
问题是，当在删除一些其他框之后将框(room0的子元素)添加到XML文件中时，它会添加以前从XML文件中删除的所有框，而不是只添加一个框.
我的目标是:
-
按下添加框按钮时，将框添加到XML文件中的Room 0元素下
-
将相应的框移至其减号按钮
-
然后，每次按下添加框按钮(而不是在减go 框后移除所有框)时，可以添加一个框
XML树:(文件名为"asumy.xml"
<data>
<room0 />
</data>
代码:
import tkinter as tk
from tkinter import *
import xml.etree.ElementTree as ET
root = Tk()
#root dimentions
root.geometry("500x560")
root.title("Box & room organiser")
root.resizable(False,False)
root.configure(background = "#2a2828")
#xml
tree = ET.parse("summary.xml")
xmlroot = tree.getroot()
#function that indents and writes xml file when called
def write_xml(tree):
ET.indent(tree, space = '\t', level = 0)
tree.write('summary.xml')
#iterates through the root finding elements of xmlroot
for room0 in xmlroot:
if room0.tag == 'room0':
xml_room0 = room0
#counter variable for amount of boxes in xml file
box_count = 0
def add_box():
global box_count
box_count = box_count + 1
#if box count is 1 add box 1
if box_count == 1:
# adding room0's box 1 to the xml file
for room0 in xmlroot.findall('room0'):
box1=ET.Element('box1')
room0.append(box1)
#alternative way of adding-->
# xml_room0_box1 = ET.SubElement(xml_room0, "box1")
write_xml(tree)
print('box1 added')
elif box_count == 2:
#adding room0's box 2 to the xml file
for room0 in xmlroot.findall('room0'):
box2=ET.Element('box2')
room0.append(box2)
# xml_room0_box2 = ET.SubElement(xml_room0, "box2")
write_xml(tree)
print('box2 added')
elif box_count == 3:
#adding room0's box 3 to the xml file
for room0 in xmlroot.findall('room0'):
box3=ET.Element('box3')
room0.append(box3)
# xml_room0_box3 = ET.SubElement(xml_room0, "box3")
write_xml(tree)
print('box3 added')
elif box_count == 4:
#adding room0's box 4 to the xml file
for room0 in xmlroot.findall('room0'):
box4=ET.Element('box4')
room0.append(box4)
# xml_room0_box4 = ET.SubElement(xml_room0, "box4")
write_xml(tree)
print('box4 added')
elif box_count == 5:
#adding room0's box 5 to the xml file
for room0 in xmlroot.findall('room0'):
box5=ET.Element('box5')
room0.append(box5)
# xml_room0_box5 = ET.SubElement(xml_room0, "box5")
write_xml(tree)
print('box5 added')
elif box_count == 6:
#adding room0's box 6 to the xml file
for room0 in xmlroot.findall('room0'):
box6=ET.Element('box6')
room0.append(box6)
# xml_room0_box6 = ET.SubElement(xml_room0, "box6")
write_xml(tree)
print('box6 added')
add_box_button = Button(root, text = "+", command = add_box)
add_box_button.pack()
#alternative minus code using etree
# from lxml import etree (add at top if using alternative)
# for elem in parse_tree.findall('//box1'): #findall or xpath (no difference)
# parent = elem.getparent()
# parent.remove(elem)
# print(etree.tostring(parse_tree))
# parse_tree.write('summary.xml')
def minus_box1():
#removes box1 element from xml file
global box_count
box_count = box_count - 1
tree =ET.parse('summary.xml')
xml_root = tree.getroot()
for room0 in xml_root:
if room0.tag == 'room0':
for box1 in room0:
if box1.tag == 'box1':
room0.remove(box1)
write_xml(tree)
print('box1 minused')
def minus_box2():
global box_count
box_count = box_count - 1
#removes box1 element from summary.xml
tree=ET.parse('summary.xml')
xmlroot = tree.getroot()
for room0 in xmlroot:
if room0.tag == 'room0':
for box2 in room0:
if box2.tag == 'box2':
room0.remove(box2)
write_xml(tree)
print('box2 minused')
def minus_box3():
global box_count
box_count = box_count - 1
#removes box1 element from summary.xml
tree=ET.parse('summary.xml')
xmlroot = tree.getroot()
for room0 in xmlroot:
if room0.tag == 'room0':
for box3 in room0:
if box3.tag == 'box3':
room0.remove(box3)
write_xml(tree)
print('box3 minused')
def minus_box4():
global box_count
box_count = box_count - 1
#removes box1 element from summary.xml
tree=ET.parse('summary.xml')
xmlroot = tree.getroot()
for room0 in xmlroot:
if room0.tag == 'room0':
for box4 in room0:
if box4.tag == 'box4':
room0.remove(box4)
write_xml(tree)
print('box4 minused')
def minus_box5():
global box_count
box_count = box_count - 1
#removes box1 element from summary.xml
tree=ET.parse('summary.xml')
xmlroot = tree.getroot()
for room0 in xmlroot:
if room0.tag == 'room0':
for box5 in room0:
if box5.tag == 'box5':
room0.remove(box5)
write_xml(tree)
print('box5 minused')
def minus_box6():
global box_count
box_count = box_count - 1
#removes box1 element from summary.xml
tree=ET.parse('summary.xml')
xmlroot = tree.getroot()
for room0 in xmlroot:
if room0.tag == 'room0':
for box6 in room0:
if box6.tag == 'box6':
room0.remove(box6)
write_xml(tree)
print('box6 minused')
#minus box buttons
room0_box1_minus_button = Button(root, text="-b1", bg = "#2b2828", command = minus_box1)
room0_box1_minus_button.pack()
room0_box2_minus_button = Button(root, text="-b2", bg = "#2b2828", command = minus_box2)
room0_box2_minus_button.pack()
room0_box3_minus_button = Button(root, text="-b3", bg = "#2b2828", command = minus_box3)
room0_box3_minus_button.pack()
room0_box4_minus_button = Button(root, text="-b4", bg = "#2b2828", command = minus_box4)
room0_box4_minus_button.pack()
room0_box5_minus_button = Button(root, text="-b5", bg = "#2b2828", command = minus_box5)
room0_box5_minus_button.pack()
room0_box6_minus_button = Button(root, text="-b6", bg = "#2b2828", command = minus_box6)
room0_box6_minus_button.pack()
root.mainloop()