运行环境：Windows 8.1
Python：2.7.6

在安装的时候，我使用的pip来进行安装,命令如下：
复制代码 代码如下:
pip install beautifulsoup4

运行的时候，报错如下：
复制代码 代码如下:
Exception:
Traceback (most recent call last):
  File "J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\basecomm
.py", line 122, in main
    status = self.run(options, args)
  File "J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\commands
stall.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bu
e=self.bundle)
  File "J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\req.py",
ne 1229, in prepare_files
    req_to_install.run_egg_info()
  File "J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\req.py",
ne 292, in run_egg_info
    logger.notify('Running setup.py (path:%s) egg_info for package %s' % (sel
etup_py, self.name))
  File "J:\Program Files (x86)\Python\Python27\lib\site-packages\pip\req.py",
ne 265, in setup_py
    import setuptools
  File "build\bdist.win-amd64\egg\setuptools\__init__.py", line 11, in <modul
    from setuptools.extension import Extension
  File "build\bdist.win-amd64\egg\setuptools\extension.py", line 5, in <modul
  File "build\bdist.win-amd64\egg\setuptools\dist.py", line 15, in <module>
  File "build\bdist.win-amd64\egg\setuptools\compat.py", line 19, in <module>
  File "J:\Program Files (x86)\Python\Python27\lib\SimpleHTTPServer.py", line
, in <module>
    class SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
  File "J:\Program Files (x86)\Python\Python27\lib\SimpleHTTPServer.py", line
8, in SimpleHTTPRequestHandler
    mimetypes.init() # try to read system mime.types
  File "J:\Program Files (x86)\Python\Python27\lib\mimetypes.py", line 358, i
nit
    db.read_windows_registry()
  File "J:\Program Files (x86)\Python\Python27\lib\mimetypes.py", line 258, i
ead_windows_registry
    for subkeyname in enum_types(hkcr):
  File "J:\Program Files (x86)\Python\Python27\lib\mimetypes.py", line 249, i
num_types
    ctype = ctype.encode(default_encoding) # omit in 3.x!
UnicodeDecodeError: 'ascii' codec can't decode byte 0xb0 in position 1: ordin
not in range(128)

Storing debug log for failure in C:\Users\Administrator\pip\pip.log

解决方法：打开C:\Python27\Lib下的 mimetypes.py 文件，找到大概256行的
复制代码 代码如下:
default_encoding = sys.getdefaultencoding()

改成：
复制代码 代码如下:
if sys.getdefaultencoding() != 'gbk':
    reload(sys)
    sys.setdefaultencoding('gbk')
default_encoding = sys.getdefaultencoding()

安装成功后，验证是否安装成功：
复制代码 代码如下:
C:\Users\Administrator>python
Python 2.7.6 (default, Nov 10 2013, 19:24:24) [MSC v.1500 64 bit (AMD64)] on 32
Type "help", "copyright", "credits" or "license" for more information.
> from bs4 import BeautifulSoup
> exit()

如果“from bs4 import BeautifulSoup”没有报错的话，则说明安装成功，否则，将报类似错误如下：
复制代码 代码如下:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named bs4