BeautifulSoup基礎引用

html_doc = '''
<html><head><title>hello,tester</title></head><body>
<p class="title"><b><h1>Hello,welcome</h1></b></p>
<p class="documentation">Tester, welcome! This is a new partion of your job's life. With python, you can finnish your work easier and faster.How, <a href="http://example.com/easier" class="easier" id="link1"> easier </a> and <a href="http://example.com/faster" class="faster" id = "link2">faster</a> Now, you have a initial impression about python.</p>
<p class="documention">let's go!!!</p> 
</body></html>
'''

上面是一段html代碼，可以用這段代碼來初步瞭解BeautifulSoup。

from bs4 import BeautifulSoup

soup = BeautifulSoup(html_doc)
print("html_doc:"soup.prettify())
print("title:"soup.title)
print(soup.title.name)
print(soup.title.string)
print(soup.title.parent.name)
print(soup.p)
print(soup.p['class'])
print(soup.a)
print(soup.find_all('a'))
print(soup.find(id="link2"))
for link in soup.find_all('a'):
    print(link.get('href'))
print(soup.get_text())

依次對代碼進行解析：soup=BeautifulSoup（html_doc），將html_doc轉化爲BeautifulSoup對象
soup.prettify()，將html_doc文檔規範化輸出
soup.title,輸出整個title塊，如圖：

soup.title.name，輸出title的名稱

soup.title.string，輸出title的內容

soup.title.parent.name，輸出title的上一層的名稱

soup.p，輸出段落p的整個內容，顯示文檔中找到的第一個

soup.p[‘class’]，輸出找到的p的內容的class屬性內容：

soup.a，輸出找到的第一個