出現問題：Command "python setup.py egg_info" failed with error code 1，當進行pip3 install beautifulsoup

C:\Users\wang>pip3 install beautifulsoup
Collecting beautifulsoup
  Using cached BeautifulSoup-3.2.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\wang\AppData\Local\Temp\pip-build-3s2h_rej\beautifulsoup\se
tup.py", line 22
        print "Unit tests have failed!"
                                      ^
    SyntaxError: Missing parentheses in call to 'print'. Did you mean print(int
"Unit tests have failed!")?

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\wang\App
Data\Local\Temp\pip-build-3s2h_rej\beautifulsoup\

beautifulsoup中的內容支持python2，不支持python3。 
解決方案：安裝beautifulsoup4

C:\Users\wang>pip install bs4