以下是一个使用Python解析XML并遍历元素节点的示例代码：

import xml.dom.minidom

# 加载XML文件
dom = xml.dom.minidom.parse("example.xml")

# 获取根元素节点
root = dom.documentElement

# 遍历所有元素节点
def traverse_elements(node):
    if node.nodeType == node.ELEMENT_NODE:
        print("Element Node: " + node.nodeName)
        # 打印元素节点的属性
        if node.hasAttributes():
            attributes = node.attributes
            for i in range(attributes.length):
                attribute = attributes.item(i)
                print("Attribute: " + attribute.nodeName + " = " + attribute.nodeValue)
        # 打印元素节点的文本内容
        if node.firstChild.nodeType == node.TEXT_NODE:
            print("Text Content: " + node.firstChild.nodeValue)
    # 递归遍历子节点
    for child in node.childNodes:
        traverse_elements(child)

# 开始遍历
traverse_elements(root)

假设XML文件example.xml的内容如下：

    
        John
        New York
    
    
        Jane
        London
    

运行上述代码将输出：

Element Node: person
Attribute: age = 20
Element Node: name
Text Content: John
Element Node: city
Text Content: New York
Element Node: person
Attribute: age = 25
Element Node: name
Text Content: Jane
Element Node: city
Text Content: London