Python BeautifulSoup从父/兄弟关系中获取内容

<div class="parent">
    <div class="child1">Child 1</div>
    <div class="child2">Child 2</div>
    <div class="child3">Child 3</div>
</div>

from bs4 import BeautifulSoup

html = '''
<div class="parent">
    <div class="child1">Child 1</div>
    <div class="child2">Child 2</div>
    <div class="child3">Child 3</div>
</div>
'''

soup = BeautifulSoup(html, 'html.parser')

# 获取子节点的内容
child1 = soup.find(class_="child1").text
child2 = soup.find(class_="child2").text
child3 = soup.find(class_="child3").text
print("子节点的内容：")
print(child1)
print(child2)
print(child3)

# 获取父节点的内容
parent = soup.find(class_="child1").parent.text
print("父节点的内容：")
print(parent)

# 获取兄弟节点的内容
sibling2 = soup.find(class_="child1").find_next_sibling().text
sibling3 = soup.find(class_="child2").find_next_sibling().text
print("兄弟节点的内容：")
print(sibling2)
print(sibling3)

子节点的内容：
Child 1
Child 2
Child 3
父节点的内容：
Child 1
Child 2
Child 3
兄弟节点的内容：
Child 2
Child 3