安装beautifulsoup

每次进入python配置环境变量
cmd 输入path=%path%;D:\Python

1. `D:\Python\Scripts>pip install beautifulsoup4`
```
Collecting beautifulsoup4
Downloading https://files.pythonhosted.org/packages/8b/0e/048a2f88bc4be5e3697df9dc1f7b9d5c9c75be62676feeeb91d2e896c5ea/beautifulsoup4-4.7.1-py2-none-any.whl (94kB)
10% |███▌ | 10kB 1.7MB/s 21% |███████ | 20kB 310kB 32% |██████████▌ | 30kB 2 43% |██████████████ | 40k 54% |█████████████████▌ | 65% |█████████████████████ 75% |████████████████████████ 86% |█████████████████████████ 97% |█████████████████████████ 100% |████████████████████████████████| 102kB 301kB/s
Collecting soupsieve>=1.2 (from beautifulsoup4)
Downloading https://files.pythonhosted.org/packages/b9/a5/7ea40d0f8676bde6e464a6435a48bc5db09b1a8f4f06d41dd997b8f3c616/soupsieve-1.9.1-py2.py3-none-any.whl
Collecting backports.functools-lru-cache; python_version < "3" (from soupsieve>=1.2->beautifulsoup4)
Downloading https://files.pythonhosted.org/packages/03/8e/2424c0e65c4a066e28f539364deee49b6451f8fcd4f718fefa50cc3dcf48/backports.functools_lru_cache-1.5-py2.py3-none-any.whl
Installing collected packages: backports.functools-lru-cache, soupsieve, beautifulsoup4
Successfully installed backports.functools-lru-cache-1.5 beautifulsoup4-4.7.1 soupsieve-1.9.1
You are using pip version 18.1, however version 19.0.3 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
```

The issue only records a successful beautifulsoup4 installation on Windows; it names no repository files, tests, or requested change. First clarify whether an environment setup instruction or another change is wanted, then identify the relevant documentation entry point. The issue does not define what completion should look like.

Written by the indexing model from the issue text.