BeautifulSoup导入错误

Question

我正在尝试编写一个简单的本地python脚本来进行一些html解析。我安装了beautifulsoup4并使用导入

from bs4 import BeautifulSoup

但我得到了错误：

Traceback (most recent call last):
  File "scrape_descriptions.py", line 1, in <module>
    from bs4 import BeautifulSoup
ImportError: No module named 'bs4'

我试过用各种方法安装BS4。首先我做了

sudo pip install BeautifulSoup4

然后我尝试从网站下载实际文件并运行

sudo python setup.py install

最后我尝试了

sudo su
easy_install BeautifulSoup4

所有这些操作似乎都已成功完成。但我还是犯了这个错误。我搜索过其他帖子，但几乎所有的帖子都只是安装说明，我已经做过了。

键入

pip freeze

显示bs4已安装，但正在运行

$ python3 -i
>>> help('modules')

似乎未列出bs4。

编辑1:运行sudo pip3 install BeautifulSoup会出现以下错误：

Downloading/unpacking BeautifulSoup
  Downloading BeautifulSoup-3.2.1.tar.gz
  Running setup.py (path:/private/tmp/pip_build_root/BeautifulSoup/setup.py) egg_info for package BeautifulSoup
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/private/tmp/pip_build_root/BeautifulSoup/setup.py", line 22
        print "Unit tests have failed!"
                                      ^
    SyntaxError: invalid syntax
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
  File "<string>", line 17, in <module>
  File "/private/tmp/pip_build_root/BeautifulSoup/setup.py", line 22
    print "Unit tests have failed!"
                                  ^
SyntaxError: invalid syntax
----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /private/tmp/pip_build_root/BeautifulSoup
Storing debug log for failure in /Users/griff/.pip/pip.log

编辑2：已解决！pip3失败的原因是因为我正在使用

sudo pip3 install BeautifulSoup

而不是

sudo pip3 install BeautifulSoup4

这起到了作用。谢谢

Answer 1

解决方案是：

sudo pip3 install BeautifulSoup4

Answer 2

尝试：

sudo pip install BeautifulSoup

然后

from BeautifulSoup import BeautifulSoup

您现在可以从BeautifulSoup 调用所有函数