Python3 xml新增节点失败

[手掌上的阳光]

import xml.etree.ElementTree as ET

#加载xml文件
tree = ET.ElementTree(file='goods.xml')

#抓根节点
root = tree.getroot()

count = 0
for elem in root:
    count += 1
    
#创建goods节点
goods = ET.Element('goods', {'id', count+1})
# goods.attrib = {'id': cout+1}

#创建goods的子节点goods_name节点
goods_name = ET.SubElement(goods, 'goods_name')
goods_name.text = 'HTC'
#创建goods的子节点goods_name节点
goods_price = ET.SubElement(goods, 'goods_price')
goods_price.text = 999
#创建goods的子节点goods_num节点
goods_num = ET.SubElement(goods, 'goods_num')
goods_num.text = 3

root.append(goods)
tree.write('goods.xml', encoding='utf-8', xml_declaration=True)

这段代码问题出在哪里?报下面的错误
D:\work\day3\shopping_cart>python main.py
Traceback (most recent call last):
File "main.py", line 4, in <module>
tree = ET.ElementTree(file='goods.xml')
File "D:\Python3.6\lib\xml\etree\ElementTree.py", line 557, in __init__
self.parse(file)
File "D:\Python3.6\lib\xml\etree\ElementTree.py", line 597, in parse
self._root = parser._parse_whole(source)
xml.etree.ElementTree.ParseError: unclosed token: line 27, column 0

[oyljerry]

一样的，你的xml文件goods.xml在修改前要格式正确