如何用python操作XML文件

from xml.etree.ElementTree import ElementTree, Elementclass XML_DEMO():
def __init__(self, in_path, out_path):
self.in_path = in_path
self.out_path = out_path
self.tree = None
self.parent_nodes = [] def read_xml(self):
# 读取XML文件
self.tree = ElementTree()
self.tree.parse(self.in_path) def write_xml(self):
# 将处理后的xml写入XML文件
self.tree.write(self.out_path, encoding="utf-8", xml_declaration=True) def if_match_attrib(self, node, attrib_map):
for k, v in attrib_map.items():
if node.attrib.get(k) and node.attrib.get(k) == v:
return True
return False def find_nodes_by_path(self, path):
return self.tree.findall(path) def get_node_by_attrib(self, nodelist, attrib_map):
result_nodes = []
for node in nodelist:
if self.if_match_attrib(node, attrib_map):
result_nodes.append(node)
return result_nodes @staticmethod
def change_node_attrib(nodelist, attrib_map):
for node in nodelist:
for k, v in attrib_map.items():
node.attrib[k] = v @staticmethod
def change_node_text(nodelist, text, is_add=False, is_delete=False):
for node in nodelist:
if is_add:
node.text += text
elif is_delete:
node.text = ""
else:
node.text = text @staticmethod
def create_node(tag, property_map, content):
element = Element(tag, property_map)
element.text = content
return element @staticmethod
def add_child_node(nodelist, element):
for node in nodelist:
node.append(element) @staticmethod
def del_node_by_attrib(nodelist, kv_map):
for parent_node in nodelist:
children = parent_node.getchildren()
for child in children:
for k, v in kv_map.items():
if child.attrib.get(k) and child.attrib.get(k).find(v) >= 0:
parent_node.remove(child)if __name__ == "__main__":
# 初始化xml类对象，指定源文件和目标文件
xd = XML_DEMO("sec.xml", "des.xml")
xd.read_xml()
# 需要删除的节点的父节点
del_parent_nodes = xd.find_nodes_by_path("packages/package/")
# 删除父节点下属性name为test的节点
xd.del_node_by_attrib(del_parent_nodes, {"name": "test"})
# 将删除后节点后的xml写入目标文件
xd.write_xml()