Python爬虫小白入门（八）Python 爬虫 – 搭建环境

安装 requests 与 BeautifulSoup4

搭建Python爬虫环境，需要安装下面2个软件包:

• requests 用于执行HTTP请求
• BeautifulSoup4 分析HTML页面

可以使用pip安装这些依赖项:

pip install requests BeautifulSoup4

安装输出

Kevin@QIKEGU C:UsersKevin
> pip install requests BeautifulSoup4
Collecting requests
  Downloading https://files.pythonhosted.org/packages/51/bd/23c926cd341ea6b7dd0b2a00aba99ae0f828be89d72b2190f27c11d4b7fb/requests-2.22.0-py2.py3-none-any.whl (57kB)
     |████████████████████████████████| 61kB 15kB/s
Collecting BeautifulSoup4
  Downloading https://files.pythonhosted.org/packages/1a/b7/34eec2fe5a49718944e215fde81288eec1fa04638aa3fb57c1c6cd0f98c3/beautifulsoup4-4.8.0-py3-none-any.whl (97kB)
     |████████████████████████████████| 102kB 10kB/s
Collecting idna<2.9,>=2.5 (from requests)
  Downloading https://files.pythonhosted.org/packages/14/2c/cd551d81dbe15200be1cf41cd03869a46fe7226e7450af7a6545bfc474c9/idna-2.8-py2.py3-none-any.whl (58kB)
     |████████████████████████████████| 61kB 28kB/s
Collecting urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 (from requests)
  Downloading https://files.pythonhosted.org/packages/e6/60/247f23a7121ae632d62811ba7f273d0e58972d75e58a94d329d51550a47d/urllib3-1.25.3-py2.py3-none-any.whl (150kB)
     |████████████████████████████████| 153kB 26kB/s
Collecting chardet<3.1.0,>=3.0.2 (from requests)
  Downloading https://files.pythonhosted.org/packages/bc/a9/01ffebfb562e4274b6487b4bb1ddec7ca55ec7510b22e4c51f14098443b8/chardet-3.0.4-py2.py3-none-any.whl (133kB)
     |████████████████████████████████| 143kB 26kB/s
Collecting certifi>=2017.4.17 (from requests)
  Downloading https://files.pythonhosted.org/packages/69/1b/b853c7a9d4f6a6d00749e94eb6f3a041e342a885b87340b79c1ef73e3a78/certifi-2019.6.16-py2.py3-none-any.whl (157kB)
     |████████████████████████████████| 163kB 31kB/s
Collecting soupsieve>=1.2 (from BeautifulSoup4)
  Downloading https://files.pythonhosted.org/packages/35/e3/25079e8911085ab76a6f2facae0771078260c930216ab0b0c44dc5c9bf31/soupsieve-1.9.2-py2.py3-none-any.whl
Installing collected packages: idna, urllib3, chardet, certifi, requests, soupsieve, BeautifulSoup4
Successfully installed BeautifulSoup4-4.8.0 certifi-2019.6.16 chardet-3.0.4 idna-2.8 requests-2.22.0 soupsieve-1.9.2 urllib3-1.25.3

验证安装

进入Python，尝试导入requests 与 bs4(BeautifulSoup4)模块，如果没报错，表明安装成功。

Kevin@QIKEGU C:UsersKevin
> python
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 22:22:05) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> import bs4
>>>