子标签和后代标签: .children 和 .descendants
昨天看书，没有用enumurate枚举的时候，直接print，完全发觉不了他们的区别，倍感困惑。
今天看了其他人写的教程，用了枚举法，终于，终于，发现它们之间的区别啦！敲锣打鼓，掌声响起来
还要注意，子代接下一个子代时，可能是换行符，看下面children找出的子代，你就可以体会到啦！
descendants是找了子标签，然后再一步步探入别人的家中，把一个个后代，按辈分由大往小找着。
下面以这段html作为栗子：
html ="""
<html>
<head>
<title>The Dormouse's story</title>
</head>
<body>
<p class="story">
Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">
<span>Elsie</span>
</a>
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a>
and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>
and they lived at the bottom of a well.
</p>
<p class="story">...</p>
"""
1.说说我们的 .children
输入：
from bs4 import BeautifulSoup
soup1 = BeautifulSoup(html, 'lxml')
print(soup1.p.children)
for i, child in enumerate(soup1.p.children):
print(i, child)
输出：
<list_iterator object at 0x000000DD59609898>
0
Once upon a time there were three little sisters; and their names were
1 <a class="sister" href="http://example.com/elsie" id="link1">
<span>Elsie</span>
</a>
2
3 <a class="sister" href="http://example.com/lacie" id="link2">Lacie</a>
4
and
5 <a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>
6
and they lived at the bottom of a well.
2.说说我们的 .descendants
输入：
from bs4 import BeautifulSoup
soup2 = BeautifulSoup(html, 'lxml')
print(soup2.p.children)
for i, desc in enumerate(soup2.p.descendants):
print(i, desc)
输出：
<list_iterator object at 0x000000DD595897B8>
0
Once upon a time there were three little sisters; and their names were
1 <a class="sister" href="http://example.com/elsie" id="link1">
<span>Elsie</span>
</a>
2
3 <span>Elsie</span>
4 Elsie
5
6
7 <a class="sister" href="http://example.com/lacie" id="link2">Lacie</a>
8 Lacie
9
and
10 <a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>
11 Tillie
12
and they lived at the bottom of a well.
形象点说，就是假设现在小区里要调查房屋入住情况。
.children呢，找出每一户，登记一下有没人住，就完事了。
而 .descendants呢，就不一样了。登记完每一户的入住情况后，还要登记每间房的入住情况，
每间房分别住了谁，兴趣、职业、爱好、户口所在地……
势必把你查清查楚。
哎呀，妈呀，好可怕！
这就是他们的区别了
最近天气热到爆炸，老天可否大发慈悲一回？
我要融化了
化了
了
欢迎指错。 Thanks！
