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language_learning/2020.10.17_0_web_scraping_with_BeautifulSoup/BeautifulSoup.py

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+from bs4 import BeautifulSoup
+from urllib.request import urlopen
+
+# 最简单的情况
+html = urlopen("https://mofanpy.com/static/scraping/basic-structure.html").read().decode('utf-8')
+print('\n显示网页的代码信息1：\n\n ----------------开始----------------\n', html, '\n\n----------------结束----------------')  # 显示网页的代码信息
+
+soup = BeautifulSoup(html, features='lxml')   # 把网页放进BeautifulSoup
+print('\n获取标签_标题h1_中的内容soup.h1：\n', soup.h1)
+print('\n获取标签_段落p_中的内容soup.p：\n', soup.p)
+print('\n获取标签_链接a_中的内容soup.a：\n', soup.a)
+
+all_href = soup.find_all('a')
+print('\n获取所有"a标签"的内容soup.find_all(‘a’)：\n', all_href)
+
+print('\n获取某个字典的值_1：')
+for a in all_href:
+    print(a)
+    print(a['href'])
+
+all_href = [a['href'] for a in all_href]
+print('\n获取某个字典的值_2：\n', all_href, '\n')
+
+
+
+
+# 加入CSS内容
+html = urlopen("https://mofanpy.com/static/scraping/list.html").read().decode('utf-8')
+print('\n显示网页的代码信息2：\n\n ----------------开始----------------\n', html, '\n\n----------------结束----------------')  # 显示网页的代码信息
+
+soup = BeautifulSoup(html, features='lxml')  # 把网页放进BeautifulSoup
+
+print('\n利用class筛选出所需要的信息：')
+month = soup.find_all('li', {"class": "month"})
+print(month, '\n')
+
+print('只显示文本：')
+for m in month:
+    print(m.get_text())
+
+print('\n 多次筛选：')
+january = soup.find('ul', {"class": 'jan'})
+print(january, '\n')
+d_january = january.find_all('li')  # use january as a parent
+print(d_january, '\n')
+for d in d_january:
+    print(d.get_text())